Power Query的本质——M语言。

Power Query 在Excel2010和2013中是以插件形式存在的，Excel2016中已经内置这一功能了，其可见微软对其的重视。
值得欣慰的是，PQ不仅为我们快速导入不同数据源数据提供便利，也为我们提供了一系列新的函数，PQ中的公式简称为M公式，与PowerPivot中的DAX表达式是两兄弟。

什么是M语言：用一种既定的函数公式来记录在power query中的操作。这些函数公式的集合，统称为M语言。

怎样学M语言的公式？

（https://msdn.microsoft.com/library/Mt253322?ui=en-US&rs=en-US&ad=US）

使用M语言的注意事项：

函数区分大小写
数据类型很严格
没有单元格引用的概念
必选与可选参数的区分

下面则是具体的公式：

Power Query (informally known as "M") formula categories

This topic applies to the Power Query Formula Language which can be used with Power Query and Power BI Desktop to build queries that mashup data. See the list of function categories.

About

The following tables describe the Power Query formula categories that can be used to manually create or modify queries. These formula functions can also be used in the Power BI Designer, in the Query view.

Number

Constants

Function Description
Number.NaN Represents 0/0.
Number.NegativeInfinity Represents -1/0.
Number.PositiveInfinity Represents 1/0.
Number.Epsilon Returns the smallest possible number.
Number.E Returns 2.7182818284590451, the value of e up to 16 decimal digits.
Number.PI Returns 3.1415926535897931, the value for Pi up to 16 decimal digits.

Information

Function Description
Number.IsNaN Returns true if a value is Number.NaN.
Number.IsEven Returns true if a value is an even number.
Number.IsOdd Returns true if a value is an odd number.

Conversion and formatting

Function Description
Number.FromText Returns a number value from a text value.
Number.ToText Returns a text value from a number value.
Number.From Returns a number value from a value.
Byte.From Returns a 8-bit integer number value from the given value.
Int8.From Returns a signed 8-bit integer number value from the given value.
Int16.From Returns a 16-bit integer number value from the given value.
Int32.From Returns a 32-bit integer number value from the given value.
Int64.From Returns a 64-bit integer number value from the given value.
Single.From Returns a Single number value from the given value.
Double.From Returns a Double number value from the given value.
Decimal.From Returns a decimal number value from the given value.
Currency.From Returns a currency value from the given value.
Percentage.From Returns a percentage value from the given value.

Rounding

Function Description
Number.RoundDown Returns the largest integer less than or equal to a number value.
Number.RoundUp Returns the larger integer greater than or equal to a number value.
Number.RoundTowardZero Returns Number.RoundDown(x) when x >= 0 and Number.RoundUp(x) when x < 0.
Number.RoundAwayFromZero Returns Number.RoundUp(value) when value >= 0 and Number.RoundDown(value) when value < 0.
Number.Round Returns a nullable number (n) if value is an integer.

Operations

Function Description
Number.Abs Returns the absolute value of a number.
Number.Sign Returns 1 for positive numbers, -1 for negative numbers or 0 for zero.
Number.IntegerDivide Divides two numbers and returns the whole part of the resulting number.
Number.Mod Divides two numbers and returns the remainder of the resulting number.
Number.Power Returns a number raised by a power.
Number.Sqrt Returns the square root of a number.
Number.Exp Returns a number representing e raised to a power.
Number.Ln Returns the natural logarithm of a number.
Number.Log Returns the logarithm of a number to the base.
Number.Log10 Returns the base-10 logarithm of a number.
Number.Factorial Returns the factorial of a number.
Number.Combinations Returns the number of combinations of a given number of items for the optional combination size.
Number.Permutations Returns the number of total permutatons of a given number of items for the optional permutation size.

Random

Function Description
Number.Random Returns a random fractional number between 0 and 1.
Number.RandomBetween Returns a random number between the two given number values.

Trigonometry

Function Description
Number.Acos Returns the arccosine of a number.
Number.Asin Returns the arcsine of a number.
Number.Atan Returns the arctangent of a number.
Number.Atan2 Returns the arctangent of the division of two numbers.
Number.Cos Returns the cosine of a number.
Number.Cosh Returns the hyperbolic cosine of a number.
Number.Sin Returns the sine of a number.
Number.Sinh Returns the hyperbolic sine of a number.
Number.Tan Returns the tangent of a number.
Number.Tanh Returns the hyperbolic tangent of a number.

Bytes

Function Description
Number.BitwiseAnd Returns the result of a bitwise AND operation on the provided operands.
Number.BitwiseNot Returns the result of a bitwise NOT operation on the provided operands.
Number.BitwiseOr Returns the result of a bitwise OR operation on the provided operands.
Number.BitwiseShiftLeft Returns the result of a bitwise shift left operation on the operands.
Number.BitwiseShiftRight Returns the result of a bitwise shift right operation on the operands.
Number.BitwiseXor Returns the result of a bitwise XOR operation on the provided operands.

Text

Information

Function Description
Text.Length Returns the number of characters in a text value.

Text Comparisons

Function Description
Character.FromNumber Returns a number to its character value.
Character.ToNumber Returns a character to its number value.
Text.From Returns the text representation of a number, date, time, datetime, datetimezone, logical, duration or binary value. If a value is null, Text.From returns null. The optional culture parameter is used to format the text value according to the given culture.
Text.FromBinary Decodes data from a binary value in to a text value using an encoding.
Text.NewGuid Returns a Guid value as a text value.
Text.ToBinary Encodes a text value into binary value using an encoding.
Text.ToList Returns a list of characters from a text value.
Value.FromText Decodes a value from a textual representation, value, and interprets it as a value with an appropriate type. Value.FromText takes a text value and returns a number, a logical value, a null value, a DateTime value, a Duration value, or a text value. The empty text value is interpreted as a null value.

Extraction

Function Description
Text.At Returns a character starting at a zero-based offset.
Text.Range Returns a number of characters from a text value starting at a zero-based offset and for count number of characters.
Text.Start Returns the count of characters from the start of a text value.
Function Description
Text.End Returns the number of characters from the end of a text value.

Modification

Function Description
Text.Insert Returns a text value with newValue inserted into a text value starting at a zero-based offset.
Text.Remove Removes all occurrences of a character or list of characters from a text value. The removeChars parameter can be a character value or a list of character values.
Text.RemoveRange Removes count characters at a zero-based offset from a text value.
Text.Replace Replaces all occurrences of a substring with a new text value.
Text.ReplaceRange Replaces length characters in a text value starting at a zero-based offset with the new text value.

Membership

Function Description
Text.Contains Returns true if a text value substring was found within a text value string; otherwise, false.
Text.EndsWith Returns a logical value indicating whether a text value substring was found at the end of a string.
Text.PositionOf Returns the first occurrence of substring in a string and returns its position starting at startOffset.
Text.PositionOfAny Returns the first occurrence of a text value in list and returns its position starting at startOffset.
Text.StartsWith Returns a logical value indicating whether a text value substring was found at the beginning of a string.

Transformations

Function Description
Text.Clean Returns the original text value with non-printable characters removed.
Text.Combine Returns a text value that is the result of joining all text values with each value separated by a separator.
Text.Lower Returns the lowercase of a text value.
Text.PadEnd Returns a text value padded at the end with pad to make it at least length characters.
Text.PadStart Returns a text value padded at the beginning with pad to make it at least length characters. If pad is not specified, whitespace is used as pad.
Text.Proper Returns a text value with first letters of all words converted to uppercase.
Text.Repeat Returns a text value composed of the input text value repeated a number of times.
Text.Split Returns a list containing parts of a text value that are delimited by a separator text value.
Text.SplitAny Returns a list containing parts of a text value that are delimited by any separator text values.
Text.Trim Removes any occurrences of characters in trimChars from text.
Text.TrimEnd Removes any occurrences of the characters specified in trimChars from the end of the original text value.
Text.TrimStart Removes any occurrences of the characters in trimChars from the start of the original text value.
Text.Upper Returns the uppercase of a text value.

Logical

Function Description
Logical.From Returns a logical value from a value.
Logical.FromText Returns a logical value of true or false from a text value.
Logical.ToText Returns a text value from a logical value.

Date

Function Description
Date.AddDays Returns a Date/DateTime/DateTimeZone value with the day portion incremented by the number of days provided. It also handles incrementing the month and year potions of the value as appropriate.
Date.AddMonths Returns a DateTime value with the month portion incremented by n months.
Date.AddQuarters Returns a Date/DateTime/DateTimeZone value incremented by the number of quarters provided. Each quarter is defined as a duration of three months. It also handles incrementing the year potion of the value as appropriate.
Date.AddWeeks Returns a Date/DateTime/DateTimeZone value incremented by the number of weeks provided. Each week is defined as a duration of seven days. It also handles incrementing the month and year potions of the value as appropriate.
Date.AddYears Returns a DateTime value with the year portion incremented by n years.
Date.Day Returns the day for a DateTime value.
Date.DayOfWeek Returns a number between 0 and 6 representing the day of the week from a DateTime value.
Date.DayOfYear Returns a number that represents the day of the year from a DateTime value.
Date.DaysInMonth Returns the number of days in the month from a DateTime value.
Date.EndOfDay Returns a DateTime value for the end of the day.
Date.EndOfMonth Returns a DateTime value for the end of the month.
Date.EndOfQuarter Returns a Date/DateTime/DateTimeZone value representing the end of the quarter. The date and time portions are reset to their terminating values for the quarter. The timezone information is persisted.
Date.EndOfWeek Returns a DateTime value for the end of the week.
Date.EndOfYear Returns a DateTime value for the end of the year.
Date.From Returns a date value from a value.
Date.FromText Returns a Date value from a set of date formats and culture value.
Date.IsInCurrentMonth Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the current month, as determined by the current date and time on the system.
Date.IsInCurrentQuarter Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the current quarter, as determined by the current date and time on the system.
Date.IsInCurrentWeek Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the current week, as determined by the current date and time on the system.
Date.IsInCurrentYear Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the current year, as determined by the current date and time on the system.
Date.IsInNextMonth Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the next month, as determined by the current date and time on the system.
Date.IsInNextQuarter Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the next quarter, as determined by the current date and time on the system.
Date.IsInNextWeek Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the next week, as determined by the current date and time on the system.
Date.IsInNextYear Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the next year, as determined by the current date and time on the system.
Date.IsInPreviousMonth Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the previous month, as determined by the current date and time on the system.
Date.IsInPreviousQuarter Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the previous quarter, as determined by the current date and time on the system.
Date.IsInPreviousWeek Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the previous week, as determined by the current date and time on the system.
Date.IsInPreviousYear Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the previous year, as determined by the current date and time on the system.
Date.IsInYearToDate Returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred in the period starting January 1st of the current year and ending on the current day, as determined by the current date and time on the system.
Date.IsLeapYear Returns a logical value indicating whether the year portion of a DateTime value is a leap year.
Date.Month Returns the month from a DateTime value.
Date.QuarterOfYear Returns a number between 1 and 4 for the quarter of the year from a DateTime value.
Date.StartOfDay Returns a DateTime value for the start of the day.
Date.StartOfMonth Returns a DateTime value representing the start of the month.
Date.StartOfQuarter Returns a DateTime value representing the start of the quarter.
Date.StartOfWeek Returns a DateTime value representing the start of the week.
Date.StartOfYear Returns a DateTime value representing the start of the year.
Date.ToRecord Returns a record containing parts of a Date value.
Date.ToText Returns a text value from a Date value.
Date.WeekOfMonth Returns a number for the count of week in the current month.
Date.WeekOfYear Returns a number for the count of week in the current year.
Date.Year Returns the year from a DateTime value.
#date Creates a date value from year, month, and day.

Time

Function Description
Time.EndOfHour Returns a DateTime value from the end of the hour.
Time.From Returns a time value from a value.
Time.FromText Returns a Time value from a set of date formats.
Time.Hour Returns an hour value from a DateTime value.
Time.Minute Returns a minute value from a DateTime value.
Time.Second Returns a second value from a DateTime value
Time.StartOfHour Returns the first value of the hour from a time value.
Time.ToRecord Returns a record containing parts of a Date value.
Time.ToText Returns a text value from a Time value.

DateTime

Function Description
DateTime.AddZone Adds the timezonehours as an offset to the input datetime value and returns a new datetimezone value.
DateTime.Date Returns a date part from a DateTime value
DateTime.FixedLocalNow Returns a DateTime value set to the current date and time on the system.
DateTime.From Returns a datetime value from a value.
DateTime.FromFileTime Returns a DateTime value from the supplied number.
DateTime.FromText Returns a DateTime value from a set of date formats and culture value.
DateTime.LocalNow Returns a datetime value set to the current date and time on the system.
DateTime.Time Returns a time part from a DateTime value.
DateTime.ToRecord Returns a record containing parts of a DateTime value.
DateTime.ToText Returns a text value from a DateTime value.

DateTimeZone

Function Description
DateTimeZone.FixedLocalNow Returns a DateTimeZone value set to the current date, time, and timezone offset on the system.
DateTimeZone.FixedUtcNow Returns the current date and time in UTC (the GMT timezone).
DateTimeZone.From Returns a datetimezone value from a value.
DateTimeZone.FromFileTime Returns a DateTimeZone from a number value.
DateTimeZone.FromText Returns a DateTimeZone value from a set of date formats and culture value.
DateTimeZone.LocalNow Returns a DateTime value set to the current system date and time.
DateTimeZone.RemoveZone Returns a datetime value with the zone information removed from the input datetimezone value.
DateTimeZone.SwitchZone Changes the timezone information for the input DateTimeZone.
DateTimeZone.ToLocal Returns a DateTime value from the local time zone.
DateTimeZone.ToRecord Returns a record containing parts of a DateTime value.
DateTimeZone.ToText Returns a text value from a DateTime value.
DateTimeZone.ToUtc Returns a DateTime value to the Utc time zone.
DateTimeZone.UtcNow Returns a DateTime value set to the current system date and time in the Utc timezone.
DateTimeZone.ZoneHours Returns a time zone hour value from a DateTime value.
DateTimeZone.ZoneMinutes Returns a time zone minute value from a DateTime value.

Duration

Function Description
Duration.Days Returns the day component of a Duration value.
Duration.From Returns a duration value from a value.
Duration.FromText Returns a Duration value from a text value.
Duration.Hours Returns an hour component of a Duration value.
Duration.Minutes Returns a minute component of a Duration value.
Duration.Seconds Returns a second component of a Duration value.
Duration.ToRecord Returns a record with parts of a Duration value.
Duration.TotalDays Returns the total magnitude of days from a Duration value.
Duration.TotalHours Returns the total magnitude of hours from a Duration value.
Duration.TotalMinutes Returns the total magnitude of minutes from a Duration value.
Duration.TotalSeconds Returns the total magnitude of seconds from a duration value.
Duration.ToText Returns a text value from a Duration value.

Record

Information

Function Description
Record.FieldCount Returns the number of fields in a record.
Record.HasFields Returns true if the field name or field names are present in a record.

Transformations

Function Description
Record.AddField Adds a field from a field name and value.
Record.Combine Combines the records in a list.
Record.TransformFields Transforms fields by applying transformOperations. For more more information about values supported by transformOperations, see Parameter Values.
Record.RemoveFields Returns a new record that reorders the given fields with respect to each other. Any fields not specified remain in their original locations.
Record.ReorderFields Returns a new record that reorders fields relative to each other. Any fields not specified remain in their original locations. Requires two or more fields.
Record.RenameFields Returns a new record that renames the fields specified. The resultant fields will retain their original order. This function supports swapping and chaining field names. However, all target names plus remaining field names must constitute a unique set or an error will occur.

Selection

Function Description
Record.Field Returns the value of the given field. This function can be used to dynamically create field lookup syntax for a given record. In that way it is a dynamic verison of the record[field] syntax.
Record.FieldValues Returns a list of field values in order of the record's fields.
Record.FieldNames Returns a list of field names in order of the record's fields.
Record.FieldOrDefault Returns the value of a field from a record, or the default value if the field does not exist.
Record.SelectFields Returns a new record that contains the fields selected from the input record. The original order of the fields is maintained.

Serialization

Function Description
Record.ToTable Returns a table of records containing field names and values from an input record.
Record.FromTable Returns a record from a table of records containing field names and values.
Record.ToTable Returns a record from a list of field values and a set of field names.

Parameter Values

The following type definitions are used to describe the parameter values that are referenced in Record functions above.

   
MissingField option MissingField.Error = 0
MissingField.Ignore = 1
MissingField.UseNull = 2
Transform operations Transform operations can be specified by either of the following values:

A list value of two items, first item being the field name and the second item being the transformation function applied to that field to produce a new value.

A list of transformations can be provided by providing a list value, and each item being the list value of 2 items as described above.

For examples, see description of Record.TransformFields
Rename operations Rename operations for a record can be specified as either of:

A single rename operation, which is represented by a list of two field names, old and new.

For examples, see description of Record.RenameFields.

List

These functions deal with list of values.

Information

Function Description
List.Count Returns the number of items in a list.
List.NonNullCount Returns the number of items in a list excluding null values
List.IsEmpty Returns whether a list is empty.

Selection

Function Description
List.Alternate Returns a list with the items alternated from the original list based on a count, optional repeatInterval, and an optional offset.
List.Distinct Filters a list down by removing duplicates. An optional equation criteria value can be specified to control equality comparison. The first value from each equality group is chosen.
List.IsDistinct Returns whether a list is distinct.
List.Select Selects the items that match a condition.
List.First Returns the first value of the list or the specified default if empty. Returns the first item in the list, or the optional default value, if the list is empty. If the list is empty and a default value is not specified, the function returns.
List.FirstN Returns the first set of items in the list by specifying how many items to return or a qualifying condition provided bycountOrCondition.
List.InsertRange Inserts items from values at the given index in the input list.
List.Last Returns the last set of items in the list by specifying how many items to return or a qualifying condition provided bycountOrCondition.
List.LastN Returns the last set of items in a list by specifying how many items to return or a qualifying condition.
List.MatchesAll Returns true if all items in a list meet a condition.
List.MatchesAny Returns true if any item in a list meets a condition.
List.Positions Returns a list of positions for an input list.
List.Range Returns a count items starting at an offset.
List.Single Returns the single item of the list or throws an Expression.Error if the list has more than one item.
List.SingleOrDefault Returns a single item from a list.
List.Skip Skips the first item of the list. Given an empty list, it returns an empty list. This function takes an optional parameter countOrCondition to support skipping multiple values.
List.Buffer Buffers the list in memory. The result of this call is a stable list, which means it will have a determinimic count, and order of items.
List.FindText Searches a list of values, including record fields, for a text value.

Transformation functions

Function Description
List.Accumulate Accumulates a result from the list. Starting from the initial value seed this function applies the accumulator function and returns the final result.
List.Combine Merges a list of lists into single list.
List.Transform Performs the function on each item in the list and returns the new list.
List.TransformMany Returns a list whose elements are projected from the input list.
List.Repeat Returns a list that repeats the contents of an input list count times.
List.ReplaceRange Returns a list that replaces count values in a list with a replaceWith list starting at an index.
List.RemoveRange Returns a list that removes count items starting at offset. The default count is 1.
List.RemoveFirstN Returns a list with the specified number of elements removed from the list starting at the first element. The number of elements removed depends on the optional countOrCondition parameter.
List.RemoveLastN Returns a list with the specified number of elements removed from the list starting at the last element. The number of elements removed depends on the optional countOrCondition parameter.
List.Reverse Returns a list that reverses the items in a list.
List.RemoveMatchingItems Removes all occurrences of the given values in the list.
List.RemoveItems Removes items from list1 that are present in list2, and returns a new list.
List.RemoveNulls Removes null values from a list.
List.ReplaceMatchingItems Replaces occurrences of existing values in the list with new values using the provided equationCriteria. Old and new values are provided by the replacements parameters. An optional equation criteria value can be specified to control equality comparisons. For details of replacement operations and equation criteria, see Parameter Values.
List.ReplaceValue Searches a list of values for the value and replaces each occurrence with the replacement value.

Membership functions

Since all values can be tested for equality, these functions can operate over heterogeneous lists.

Function Description
List.Contains Returns true if a value is found in a list.
List.ContainsAll Returns true if all items in values are found in a list.
List.ContainsAny Returns true if any item in values is found in a list.
List.PositionOf Finds the first occurrence of a value in a list and returns its position.
List.PositionOfAny Finds the first occurrence of any value in values and returns its position.
List.AnyTrue Returns true if any expression in a list in true
List.AllTrue Returns true if all expressions in a list are true

Set operations

Function Description
List.Difference Returns the items in list 1 that do not appear in list 2. Duplicate values are supported.
List.Intersect Returns a list from a list of lists and intersects common items in individual lists. Duplicate values are supported.
List.Union Returns a list from a list of lists and unions the items in the individual lists. The returned list contains all items in any input lists. Duplicate values are matched as part of the Union.

Ordering

Ordering functions perform comparisons. All values that are compared must be comparable with each other. This means they must all come from the same datatype (or include null, which always compares smallest). Otherwise, an Expression.Error is thrown.

Comparable data types

Number
Duration
DateTime
Text
Logical
Null

Function Description
List.Sort Returns a sorted list using comparison criterion.
List.Max Returns the maximum item in a list, or the optional default value if the list is empty.
List.MaxN Returns the maximum values in the list. After the rows are sorted, optional parameters may be specified to further filter the result
List.Min Returns the minimum item in a list, or the optional default value if the list is empty.
List.MinN Returns the minimum values in a list.
List.Median Returns the median item from a list.

Averages

These functions operate over homogeneous lists of Numbers, DateTimes, and Durations.

Function Description
List.Average Returns an average value from a list in the datatype of the values in the list.
List.StandardDeviation Returns the standard deviation from a list of values. List.StandardDeviation performs a sample based estimate. The result is a number for numbers, and a duration for DateTimes and Durations.
List.Mode Returns an item that appears most commonly in a list.
List.Modes Returns all items that appear with the same maximum frequency.

Addition

These functions work over homogeneous lists of Numbers or Durations.

Function Description
List.Sum Returns the sum from a list.

Numerics

These functions only work over numbers.

Function Description
List.Covariance Returns the covariance from two lists as a number.
List.Product Returns the product from a list of numbers.

Generators

These functions generate list of values.

Function Description
List.DateTimes Returns a list of datetime values from size count, starting at start and adds an increment to every value.
List.Dates Returns a list of date values from size count, starting at start and adds an increment to every value.
List.DateTimeZones Returns a list of of datetimezone values from size count, starting at start and adds an increment to every value.
List.Durations Returns a list of durations values from size count, starting at start and adds an increment to every value.
List.Generate Generates a list from a value function, a condition function, a next function, and an optional transformation function on the values.
List.Numbers Returns a list of numbers from size count starting at initial, and adds an increment. The increment defaults to 1.
List.Random Returns a list of count random numbers, with an optional seed parameter.

Parameter values

Occurrence specification

Occurrence.First = 0
Occurrence.Last = 1
Occurrence.All = 2

Sort order

Order.Ascending = 0
Order.Descending = 1

Equation criteria

Equation criteria for list values can be specified as either a

A function value that is either

A key selector that determines the value in the list to apply the equality criteria, or

A comparer function that is used to specify the kind of comparison to apply. Built in comparer functions can be specified, see section for Comparer functions.

A list value which has

Exactly two items

The first element is the key selector as specified above

The second element is a comparer as specified above.

For more information and examples, see List.Distinct.

Comparison criteria

Comparison criterion can be provided as either of the following values:

A number value to specify a sort order. For more information, see sort order in Parameter values.

To compute a key to be used for sorting, a function of 1 argument can be used.

To both select a key and control order, comparison criterion can be a list containing the key and order.

To completely control the comparison, a function of 2 arguments can be used that returns -1, 0, or 1 given the relationship between the left and right inputs. Value.Compare is a method that can be used to delegate this logic.

For more information and examples, see List.Sort.

Replacement operations

Replacement operations are specified by a list value, each item of this list must be

A list value of exactly two items

Fist item is the old value in the list, to be replaced

Second item is the new which should replace all occurrences of the old value in the list

Table

These functions deal with Table values.

Table construction

Function Description
Table.FromRows Creates a table from the list where each element of the list is a list that contains the column values for a single row.
Table.FromList Converts a list into a table by applying the specified splitting function to each item in the list.
Table.FromColumns Returns a table from a list containing nested lists with the column names and values.
Table.FromRecords Returns a table from a list of records.
Table.FromValue Returns a table with a column containing the provided value or list of values.

Conversions

Function Description
Table.ToColumns Returns a list of nested lists each representing a column of values in the input table.
Table.ToList Returns a table into a list by applying the specified combining function to each row of values in a table.
Table.ToRecords Returns a list of records from an input table.
Table.ToRows Returns a nested list of row values from an input table.

Information

Function Description
Table.IsEmpty Returns true if the table does not contain any rows.
Table.RowCount Returns the number of rows in a table.
Table.ColumnCount Returns the number of columns in a table.
Table.PartitionValues Returns information about how a table is partitioned.
Tables. GetRelationshsips Returns the relationships among a set of tables.

Row operations

Function Description
Table.AlternateRows Returns a table containing an alternating pattern of the rows from a table.
Table.Combine Returns a table that is the result of merging a list of tables. The tables must all have the same row type structure.
Table.FirstN Returns the first row(s) of a table, depending on the countOrCondition parameter.
Table.First Returns the first row from a table.
Table.InsertRows Returns a table with the list of rows inserted into the table at an index. Each row to insert must match the row type of the table..
Table.LastN Returns the last row(s) from a table, depending on the countOrCondition parameter.
Table.Last Returns the last row of a table.
Table.MatchesAllRows Returns true if all of the rows in a table meet a condition.
Table.MatchesAnyRows Returns true if any of the rows in a table meet a condition.
Table.Partition Partitions the table into a list of groups number of tables, based on the value of the column of each row and a hash function. The hash function is applied to the value of the column of a row to obtain a hash value for the row. The hash value modulo groups determines in which of the returned tables the row will be placed.
Table.FromPartitions Returns a table that is the result of combining a set of partitioned tables into new columns. The type of the column can optionally be specified, the default is any.
Table.Range Returns the specified number of rows from a table starting at an offset.
Table.RemoveRows Returns a table with the specified number of rows removed from the table starting at an offset.
Table.RemoveFirstN Returns a table with the specified number of rows removed from the table starting at the first row. The number of rows removed depends on the optional countOrCondition parameter.
Table.RemoveLastN Returns a table with the specified number of rows removed from the table starting at the last row. The number of rows removed depends on the optional countOrCondition parameter.
Table.RemoveRowsWithErrors Returns a table with all rows removed from the table that contain an error in at least one of the cells in a row.
Table.Repeat Returns a table containing the rows of the table repeated the count number of times.
Table.ReplaceRows Returns a table where the rows beginning at an offset and continuing for count are replaced with the provided rows.
Table.ReverseRows Returns a table with the rows in reverse order.
Table.SelectRows Returns a table containing only the rows that match a condition.
Table.SelectRowsWithErrors Returns a table with only the rows from table that contain an error in at least one of the cells in a row.
Table.SingleRow Returns a single row from a table.
Table.Skip Returns a table that does not contain the first row or rows of the table.
Table.FindText Returns a table containing only the rows that have the specified text within one of their cells or any part thereof.

Column operations

Function Description
Table.Column Returns the values from a column in a table.
Table.ColumnNames Returns the names of columns from a table.
Table.ColumnsOfType Returns a list with the names of the columns that match the specified types.
Table.HasColumns Returns true if a table has the specified column or columns.
Table.PrefixColumns Returns a table where the columns have all been prefixed with a text value.
Table.PromoteHeaders Promotes the first row of the table into its header or column names.
Table.DemoteHeaders Demotes the header row down into the first row of a table.
Table.RemoveColumns Returns a table without a specific column or columns.
Table.ReorderColumns Returns a table with specific columns in an order relative to one another.
Table.RenameColumns Returns a table with the columns renamed as specified.
Table.SelectColumns Returns a table that contains only specific columns.
Table.Pivot Given a table and attribute column containing pivotValues, creates new columns for each of the pivot values and assigns them values from the valueColumn. An optional aggregationFunction can be provided to handle multiple occurrence of the same key value in the attribute column.
Table.Unpivot Given a list of table columns, transforms those columns into attribute-value pairs.
Table.UnpivotOtherColumns Translates all columns other than a specified set into attribute-value pairs, combined with the rest of the values in each row.

Transformation

Parameters for Group options

GroupKind.Global = 0
GroupKind.Local = 1

Parameters for Join kinds

JoinKind.Inner = 0
JoinKind.LeftOuter = 1
JoinKind.RightOuter = 2
JoinKind.FullOuter = 3
JoinKind.LeftAnti = 4
JoinKind.RightAnti = 5

Join Algorithm

The following JoinAlgorithm values can be specified to Table.Join

JoinAlgorithm.Dynamic  = 0
JoinAlgorithm.PairwiseHash = 1
JoinAlgorithm.SortMerge = 2
JoinAlgorithm.LeftHash = 3
JoinAlgorithm.RightHash  = 4
JoinAlgorithm.LeftIndex = 5
JoinAlgorithm.RightIndex = 6

Example data

The following tables are used by the examples in this section.

Customers table

Customers = Table.FromRecords({  [CustomerID = 1, Name = "Bob", Phone = "123-4567"],  [CustomerID = 2, Name = "Jim", Phone = "987-6543"],  [CustomerID = 3, Name = "Paul", Phone = "543-7890"],  [CustomerID = 4, Name = "Ringo", Phone = "232-1550"]  }

Orders table

Orders = Table.FromRecords({  [OrderID = 1, CustomerID = 1, Item = "Fishing rod", Price = 100.0],  [OrderID = 2, CustomerID = 1, Item = "1 lb. worms", Price = 5.0],  [OrderID = 3, CustomerID = 2, Item = "Fishing net", Price = 25.0],  [OrderID = 4, CustomerID = 3, Item = "Fish tazer", Price = 200.0],  [OrderID = 5, CustomerID = 3, Item = "Bandaids", Price = 2.0],  [OrderID = 6, CustomerID = 1, Item = "Tackle box", Price = 20.0],  [OrderID = 7, CustomerID = 5, Item = "Bait", Price = 3.25],  [OrderID = 8, CustomerID = 5, Item = "Fishing Rod", Price = 100.0],  [OrderID = 9, CustomerID = 6, Item = "Bait", Price = 3.25]  })

Function Description
Table.AddColumn Adds a column named newColumnName to a table.
Table.AddIndexColumn Returns a table with a new column with a specific name that, for each row, contains an index of the row in the table.
Table.AddJoinColumn Performs a nested join between table1 and table2 from specific columns and produces the join result as a newColumnName column for each row of table1.
Table.AddKey Add a key to table.
Table.AggregateTableColumn Aggregates tables nested in a specific column into multiple columns containing aggregate values for those tables.
Table.ExpandListColumn Given a column of lists in a table, create a copy of a row for each value in its list.
Table.ExpandRecordColumn Expands a column of records into columns with each of the values.
Table.ExpandTableColumn Expands a column of records or a column of tables into multiple columns in the containing table.
Table.FillDown Replaces null values in the specified column or columns of the table with the most recent non-null value in the column.
Table.FillUp Returns a table from the table specified where the value of the next cell is propagated to the null values cells above in the column specified.
Table.Group Groups table rows by the values of key columns for each row.
Table.Join Joins the rows of table1 with the rows of table2 based on the equality of the values of the key columns selected by table1, key1 and table2, key2.
Table.NestedJoin Joins the rows of the tables based on the equality of the keys. The results are entered into a new column.
Table.Keys Returns a list of key column names from a table.
Table.ReplaceKeys Returns a new table with new key information set in the keys argument.
Table.CombineColumns Table.CombineColumns merges columns using a combiner function to produce a new column. Table.CombineColumns is the inverse of Table.SplitColumns.
Table.SplitColumn Returns a new set of columns from a single column applying a splitter function to each value.
Table.TransformColumns Transforms columns from a table using a function.
Table.TransformColumnTypes Transforms the column types from a table using a type.
Table.TransformRows Transforms the rows from a table using a transform function.
Table.Transpose Returns a table with columns converted to rows and rows converted to columns from the input table.
Table.ReplaceValue Replaces oldValue with newValue in specific columns of a table, using the provided replacer function, such as text.Replace or Value.Replace.
Table.ReplaceErrorValues Replaces the error values in the specified columns with the corresponding specified value.

Membership

Parameters for membership checks

Occurrence specification

Occurrence.First  = 0
Occurrence.Last   = 1
Occurrence.All    = 2

Function Description
Table.Contains Determines whether the a record appears as a row in the table.
Table.ContainsAll Determines whether all of the specified records appear as rows in the table.
Table.ContainsAny Determines whether any of the specified records appear as rows in the table.
Table.Distinct Removes duplicate rows from a table, ensuring that all remaining rows are distinct.
Table.IsDistinct Determines whether a table contains only distinct rows.
Table.PositionOf Determines the position or positions of a row within a table.
Table.PositionOfAny Determines the position or positions of any of the specified rows within the table.
Table.RemoveMatchingRows Removes all occurrences of rows from a table.
Table.ReplaceMatchingRows Replaces specific rows from a table with the new rows.

Ordering

Example data

The following tables are used by the examples in this section.

Employees table

Employees = Table.FromRecords(  {[Name="Bill",   Level=7,  Salary=100000],  [Name="Barb",   Level=8,  Salary=150000],  [Name="Andrew", Level=6,  Salary=85000],  [Name="Nikki",  Level=5,  Salary=75000],  [Name="Margo",  Level=3,  Salary=45000],  [Name="Jeff",   Level=10, Salary=200000]},  type table [  Name = text,  Level = number,  Salary = number  ])

Function Description
Table.MaxN Returns the largest N rows from a table. After the rows are sorted, the countOrCondition parameter must be specified to further filter the result.
Table.Max Returns the largest row or rows from a table using a comparisonCriteria.
Table.MinN Returns the smallest N rows in the given table. After the rows are sorted, the countOrCondition parameter must be specified to further filter the result.
Table.Min Returns the smallest row or rows from a table using a comparisonCriteria.
Table.Sort Sorts the rows in a table using a comparisonCriteria or a default ordering if one is not specified.

Other

Function Description
Table.Buffer Buffers a table into memory, isolating it from external changes during evaluation.

Parameter Values

Naming output columns

This parameter is a list of text values specifying the column names of the resulting table. This parameter is generally used in the Table construction functions, such as Table.FromRows and Table.FromList.

Comparison criteria

Comparison criterion can be provided as either of the following values:

A number value to specify a sort order. See sort order in the parameter values section above.

To compute a key to be used for sorting, a function of 1 argument can be used.

To both select a key and control order, comparison criterion can be a list containing the key and order.

To completely control the comparison, a function of 2 arguments can be used that returns -1, 0, or 1 given the relationship between the left and right inputs. Value.Compare is a method that can be used to delegate this logic.

For examples, see description of Table.Sort.

Count or Condition critieria

This criteria is generally used in ordering or row operations. It determines the number of rows returned in the table and can take two forms, a number or a condition:

A number indicates how many values to return inline with the appropriate function

If a condition is specified, the rows containing values that initially meet the condition is returned. Once a value fails the condition, no further values are considered.

See Table.FirstN or Table.MaxN.

Handling of extra values

This is used to indicate how the function should handle extra values in a row. This parameter is specified as a number, which maps to the options below.

ExtraValues.List = 0
ExtraValues.Error = 1
ExtraValues.Ignore = 2

For more information, see Table.FromList.

Missing column handling

This is used to indicate how the function should handle missing columns. This parameter is specified as a number, which maps to the options below.

MissingField.Error = 0;
MissingField.Ignore = 1;
MissingField.UseNull = 2;

This is used in column or transformation operations. For Examples, see Table.TransformColumns.

Sort Order

This is used to indicate how the results should be sorted. This parameter is specified as a number, which maps to the options below.

Order.Ascending = 0
Order.Descending = 1

Equation criteria

Equation criteria for tables can be specified as either a

A function value that is either

A key selector that determines the column in the table to apply the equality criteria, or

A comparer function that is used to specify the kind of comparison to apply. Built in comparer functions can be specified, see section for Comparer functions.

A list of the columns in the table to apply the equality criteria

For examples, look at description for Table.Distinct.

Values

Function Description
Value.Compare Returns 1, 0, or -1 based on value1 being greater than, equal to, or less than the value2. An optional comparer function can be provided.
Value.Equals Returns whether two values are equal.
Value.NullableEquals Returns a logical value or null based on two values .

Arithmetic operations

Function Description
Value.Add  
Value.Subtract  
Value.Divide  
Value.Multiply  

Parameter types

Type Description
Value.As Value.As is the function corresponding to the as operator in the formula language. The expression value as type asserts that the value of a value argument is compatible with type as per the is operator. If it is not compatible, an error is raised.
Value.Is Value.Is is the function corresponding to the is operator in the formula language. The expression value is type returns true if the ascribed type of vlaue is compatible with type, and returns false if the ascribed type of value is incompatible with type.
Value.ReplaceType A value may be ascribed a type using Value.ReplaceType. Value.ReplaceType either returns a new value with the type ascribed or raises an error if the new type is incompatible with the value’s native primitive type. In particular, the function raises an error when an attempt is made to ascribe an abstract type, such as any. When replacing a the type of a record, the new type must have the same number of fields, and the new fields replace the old fields by ordinal position, not by name. Similarly, when replacing the type of a table, the new type must have the same number of columns, and the new columns replace the old columns by ordinal position.
Value.Type The ascribed type of a value may be obtained using Value.Type.

Metadata

Function Description
Value.Metadata Returns a record containing the input’s metadata.
Value.RemoveMetadata Removes the metadata on the value and returns the original value.
Value.ReplaceMetadata Replaces the metadata on a value with the new metadata record provided and returns the original value with the new metadata attached.

Accessing data

The following deals with external data.

Return values

Functions in this section access data and return table values. Most of these functions return a table value that is called a navigation table. Anavigation table is a two column table. The first column contains the name of an item and the corresponding second column contains the value of that item. This shape is primarily used by the Power Query user interface to provide navigation experience over the potentially large hierarchical data returned.

Function Description
Access.Database Returns a structural representation of an Microsoft Access database. The database argument is The return value is a record, where each field represents a table in the Access database.
ActiveDirectory.Domains Returns a table with Domain information available in the current domain or optional Active Directory forest.
AdoDotNet.DataSource Returns the schema collection for an ADO.NET data source.
AdoDotNet.Query Returns the result of running a native query on an ADO.NET data source.
AnalysisServices.Database Returns a table of multidimensional cubes or tabular models from the Analysis Services database.
AnalysisServices.Databases Returns the Analysis Services databases on a particular host.
AzureStorage.Blobs Returns a navigational table containing all containers found in the Azure Storage account. Each row has the container name and a link to the container blobs.
AzureStorage.Tables Returns a navigational table containing a row for each table found at the account URL from an Azure storage vault. Each row contains a link to the azure table.
Csv.Document Returns the contents of a CSV document as a table using the specified encoding.
DB2.Database Returns a table with data relating to the tables in the specified DB2 Database.
Excel.Workbook Returns a table representing sheets in the given excel workbook.
Excel.CurrentWorkbook Returns the tables in the current Excel workbook
Exchange.Contents Returns a table of contents from a Microsoft Exchange account.
Facebook.Graph Returns a table containing content from the Facebook graph .
File.Contents Returns the binary contents of the file located at a path.
Folder.Contents Returns a table containing the properties and contents of the files and folders found at path.
Folder.Files Returns a table containing a row for each file found at a folder path, and subfolders. Each row contains properties of the folder or file and a link to its content.
GoogleAnalytics.Accounts Returns the Google Analytics accounts for the current credential.
Hdfs.Contents Returns a table containing a row for each folder and file found at the folder url, {0}, from a Hadoop file system. Each row contains properties of the folder or file and a link to its content.
Hdfs.Files Returns a table containing a row for each file found at the folder url, {0}, and subfolders from a Hadoop file system. Each row contains properties of the file and a link to its content.
HdInsight.Containers Returns a navigational table containing all containers found in the HDInsight account. Each row has the container name and table containing its files.
HdInsight.Contents Returns a navigational table containing all containers found in the HDInsight account. Each row has the container name and table containing its files.
HdInsight.Files Returns a table containing a row for each folder and file found at the container URL, and subfolders from an HDInsight account. Each row contains properties of the file/folder and a link to its content.
Informix.Database Returns a table of SQL tables and views available in an Informix database on server server in the database instance named database.
Json.Document Returns the contents of a JSON document. The contents may be directly passed to the function as text, or it may be the binary value returned by a function like File.Contents.
Marketplace.Subscriptions Returns feeds offered by the Microsoft Azure DataMarket subscribed by the current user as a table.
MySQL.Database Returns a table with data relating to the tables in the specified MySQL Database.
OData.Feed Returns a table of OData feeds offered by an OData serviceUri.
Odbc.DataSource Returns a table of SQL tables and views from the ODBC data source specified by the connection stringconnectionString.
Odbc.Query Connects to a generic provider with the given connection string and returns the result of evaluating the query.
OleDb.Query Returns the result of running a native query on an OLE DB data source.
Oracle.Database Returns a table with data relating to the tables in the specified Oracle Database.
RData.FromBinary Returns a record of data frames from the RData file.
PostgreSQL.Database Returns a table with data relating to the tables in the specified PostgreSQL Database.
Salesforce.Data Connects to the Salesforce Objects API and returns the set of available objects (i.e. Accounts).
Salesforce.Reports Connects to the Salesforce Reports API and returns the set of available reports.
SapBusinessObjects.Universes Connects to the SAP BusinessObjects BI Universe at the specified URL and returns the set of available universes.
SapBusinessWarehouse.Cubes Returns the InfoCubes and queries in an SAP Business Warehouse system grouped by InfoArea.
SapHana.Database Returns the packages in an SAP HANA database.
SapHanaRangeOperator.Equals 'Equals' range operator for SAP HANA input parameters.
SapHanaRangeOperator.GreaterThan 'Greater than' range operator for SAP HANA input parameters.
SapHanaRangeOperator.GreaterThanOrEquals 'Greater than or equals' range operator for SAP HANA input parameters.
SapHanaRangeOperator.LessThan 'Less than' range operator for SAP HANA input parameters.
SapHanaRangeOperator.LessThanOrEquals 'Less than or equals' range operator for SAP HANA input parameters.
SapHanaRangeOperator.NotEquals 'Not equals' range operator for SAP HANA input parameters.
SharePoint.Contents Returns a table containing a row for each folder and document found at the SharePoint site url. Each row contains properties of the folder or file and a link to its content.
SharePoint.Files Returns a table containing a row for each document found at the SharePoint site url, and subfolders. Each row contains properties of the folder or file and a link to its content.
SharePoint.Tables Returns a table containing the result of a SharePoint List as an OData feed.
Soda.Feed Returns the resulting table of a CSV file that can be accessed using the SODA 2.0 API. The URL must point to a valid SODA-compliant source that ends in a .csv extension.
Sql.Databases Returns a table with references to databases located on a SQL Server instance. Returns a navigation table.
Sql.Database Returns a table containing SQL tables located on a SQL Server instance database.
Sybase.Database Returns a table with data relating to the tables in the specified Sybase Database.
Teradata.Database Returns a table with data relating to the tables in the specified Teradata Database.
Web.Contents Returns the contents downloaded from a web url as a binary value.
Web.Page Returns the contents of an HTML webpage as a table.
Xml.Document Returns the contents of an XML document as a hierarchical table (list of records).
Xml.Tables Returns the contents of an XML document as a nested collection of flattened tables.

Uri

Function Description
Uri.Combine Returns a Uri based on the combination of the base and relative parts.
Uri.Parts Returns a record value with the fields set to the parts of a Uri text value.

Binary Formats

Reading numbers

Function Description
BinaryFormat.7BitEncodedSignedInteger A binary format that reads a 64-bit signed integer that was encoded using a 7-bit variable-length encoding.
BinaryFormat.7BitEncodedUnsignedInteger A binary format that reads a 64-bit unsigned integer that was encoded using a 7-bit variable-length encoding.
BinaryFormat.Binary Returns a binary format that reads a binary value.
BinaryFormat.Byte A binary format that reads an 8-bit unsigned integer.
BinaryFormat.ByteOrder Returns a binary format with the specified byte order.
BinaryFormat.Choice Returns a binary format that chooses the next binary format based on a value that has already been read.
BinaryFormat.Decimal A binary format that reads a .NET 16-byte decimal value.
BinaryFormat.Double A binary format that reads an 8-byte IEEE double-precision floating point value.
BinaryFormat.Group Returns a binary format that reads a group of items. Each item value is preceded by a unique key value. The result is a list of item values.
BinaryFormat.Length Returns a binary format that limits the amount of data that can be read. Both BinaryFormat.List and BinaryFormat.Binary can be used to read until end of the data. BinaryFormat.Length can be used to limit the number of bytes that are read.
BinaryFormat.List Returns a binary format that reads a sequence of items and returns a list.
BinaryFormat.Null A binary format that reads zero bytes and returns null.
BinaryFormat.Record Returns a binary format that reads a record. Each field in the record can have a different binary format.
BinaryFormat.SignedInteger16 A binary format that reads a 16-bit signed integer.
BinaryFormat.SignedInteger32 A binary format that reads a 32-bit signed integer.
BinaryFormat.SignedInteger64 A binary format that reads a 64-bit signed integer.
BinaryFormat.Single A binary format that reads a 4-byte IEEE single-precision floating point value.
BinaryFormat.Text Returns a binary format that reads a text value. The optional encoding value specifies the encoding of the text.
BinaryFormat.Transform Returns a binary format that will transform the values read by another binary format.
BinaryFormat.UnsignedInteger16 A binary format that reads a 16-bit unsigned integer.
BinaryFormat.UnsignedInteger32 A binary format that reads a 32-bit unsigned integer.
BinaryFormat.UnsignedInteger64 A binary format that reads a 64-bit unsigned integer.

Binary

Function Description
Binary.Buffer Buffers the binary value in memory. The result of this call is a stable binary value, which means it will have a deterministic length and order of bytes.
Binary.Combine Combines a list of binaries into a single binary.
Binary.From Returns a binary value from the given value.
Binary.FromList Converts a list of numbers into a binary value
Binary.FromText Decodes data from a text form into binary.
Binary.Length Returns the length of binary values.
Binary.ToList Converts a binary value into a list of numbers
Binary.ToText Encodes binary data into a text form.

Lines

Function Description
Lines.FromBinary Converts a binary value to a list of text values split at lines breaks.
Lines.FromText Converts a text value to a list of text values split at lines breaks.
Lines.ToBinary Converts a list of text into a binary value using the specified encoding and lineSeparator.The specified lineSeparator is appended to each line. If not specified then the carriage return and line feed characters are used.
Lines.ToText Converts a list of text into a single text. The specified lineSeparator is appended to each line. If not specified then the carriage return and line feed characters are used.

Expression

Function Description
Expression.Evaluate Evaluates a Text expression and returns the evaluated value.
Expression.Constant Returns a constant text literal from a value.
Expression.Identifier Returns a text value that can be used as an identifier from a text value.

Function

Function Description
Function.Invoke Invokes the given function using the specified and returns the result.

Error

Function Description
Error.Record Returns a record containing fields “Reason”, “Message”, and “Detail” set to the provided values. The record can be used to raise or throw an error.

Comparer

Function Description
Comparer.Equals Returns a logical value based on the equality check over the two given values.
Comparer.FromCulture Returns a comparer function given the culture and a logical value for case sensitivity for the comparison. The default value for ignoreCase is false. The value for culture are well known text representations of locales used in the .NET framework.
Comparer.Ordinal Returns a comparer function which uses Ordinal rules to compare values.
Culture.Current Returns the current culture of the system.

Splitter

Function Description
Splitter.SplitTextByAnyDelimiter Returns a function that splits text by at any of the delimiters.
Splitter.SplitTextByDelimiter Returns a function that will split text according to a delimiter.
Splitter.SplitTextByEachDelimiter Returns a function that splits text by each delimiter in turn.
Splitter.SplitTextByLengths Returns a function that splits text according to the specified lengths.
Splitter.SplitTextByPositions Returns a function that splits text according to the specified positions.
Splitter.SplitTextByRanges Returns a function that splits text according to the specified ranges.
Splitter.SplitTextByWhitespace Returns a function that splits text according to whitespace.

Combiner

Function Description
Combiner.CombineTextByDelimiter Returns a function that combines a list of text into a single text using the specified delimiter.
Combiner.CombineTextByEachDelimiter Returns a function that combines a list of text into a single text using each specified delimiter in sequence.
Combiner.CombineTextByLengths Returns a function that merges a list of text into a single text.
Combiner.CombineTextByPositions Returns a function that merges a list of text into a single text.
Combiner.CombineTextByRanges Returns a function that merges a list of text into a single text.

Replacer

Function Description
Replacer.ReplaceText This function be provided to List.ReplaceValue or Table.ReplaceValue to do replace of text values in list and table values respectively.
Replacer.ReplaceValue This function be provided to List.ReplaceValue or Table.ReplaceValue to do replace values in list and table values respectively.

Type

Function Description
Type.AddTableKey Add a key to a table type.
Type.ClosedRecord The given type must be a record type returns a closed version of the given record type (or the same type, if it is already closed)
Type.ForFunction Creates a function type from the given .
Type.ForList Returns a list type for an item type.
Type.ForNullable Returns a nullable type for a type.
Type.ForRecord Returns a Record type from a fields record.
Type.ForTable Constructs a table type from a row type as a record type.
Type.FunctionParameters Returns a record with field values set to the name of the parameters of a function type, and their values set to their corresponding types.
Type.FunctionRequiredParameters Returns a number indicating the minimum number of parameters required to invoke the a type of function.
Type.FunctionReturn Returns a type returned by a function type.
Type.IsNullable Returns true if a type is a nullable type; otherwise, false.
Type.IsOpenRecord Returns whether a record type is open.
Type.ListItem Returns an item type from a list type.
Type.NonNullable Returns the non nullable type from a type.
Type.OpenRecord Returns an opened version of a record type, or the same type, if it is already open.
Type.RecordFields Returns a record describing the fields of a record type with each field of the returned record type having a corresponding name and a value that is a record of the form [ Type = type, Opional = logical ].
Type.ReplaceTableKeys Replaces the keys in a table type.
Type.TableKeys Returns keys from a table type.
Type.TableRow Returns a row type from a table type.

Action

Action Description
Action.Donothing An action that performs no action when executed and returns null as its result.
Action.Return Creates an action that performs no action when executed and returns value as its result.
Action.Sequence Creates an action that executes the sequence of elements in actions in order.
Action.Try Creates an action that executes action, catches any errors that occur while executing the action, and returns a record containing a HasError field and either a Value or Error field depending on whether the action executed successfully.
TableAction.DeleteRows Creates an action to delete rows from a table.
TableAction.InsertRows Creates an action to insert rows into a table.
TableAction.UpdateRows Creates an action to update rows in a table.
ValueAction.NativeStatement Creates an action to execute a statement against a target.
ValueAction.Replace Creates an action that replaces the content of a value with the specified value.
WebAction.Request Creates an action that, when executed, will return the results of performing an HTTP request as a binary value.
WebMethod.Delete Specifies the DELETE method for HTTP.
WebMethod.Get Specifies the GET method for HTTP.
WebMethod.Head Specifies the HEAD method for HTTP.
WebMethod.Patch Specifies the PATCH method for HTTP.
WebMethod.Post Specifies the POST method for HTTP.
WebMethod.Put Specifies the PUT method for HTTP.

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