CREATE TABLE [ database_name . [ schema_name ] . | schema_name . ] table_name ( { <column_definition> | <computed_column_definition> | <column_set_definition> }[ <table_constraint> ] [ ,...n ] ) [ ON { partition_scheme_name ( partition_column_name ) | filegroup | "default" } ] [ { TEXTIMAGE_ON { filegroup | "default" } ] [ FILESTREAM_ON { partition_scheme_name | filegroup | "default" } ][ WITH ( <table_option> [ ,...n ] ) ]
[ ; ]<column_definition> ::=
column_name <data_type>[ FILESTREAM ][ COLLATE collation_name ] [ NULL | NOT NULL ][ [ CONSTRAINT constraint_name ] DEFAULT constant_expression ] | [ IDENTITY [ ( seed ,increment ) ] [ NOT FOR REPLICATION ] ][ ROWGUIDCOL ] [ <column_constraint> [ ...n ] ] [ SPARSE ] <data type> ::=
[ type_schema_name . ] type_name [ ( precision [ , scale ] | max | [ { CONTENT | DOCUMENT } ] xml_schema_collection ) ] <column_constraint> ::=
[ CONSTRAINT constraint_name ]
{     { PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] [ WITH FILLFACTOR = fillfactor  | WITH ( < index_option > [ , ...n ] ) ] [ ON { partition_scheme_name ( partition_column_name ) | filegroup | "default" } ]| [ FOREIGN KEY ] REFERENCES [ schema_name . ] referenced_table_name [ ( ref_column ) ] [ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression )
} <computed_column_definition> ::=
column_name AS computed_column_expression
[ PERSISTED [ NOT NULL ] ]
[ [ CONSTRAINT constraint_name ]{ PRIMARY KEY | UNIQUE }[ CLUSTERED | NONCLUSTERED ][ WITH FILLFACTOR = fillfactor | WITH ( <index_option> [ , ...n ] )]| [ FOREIGN KEY ] REFERENCES referenced_table_name [ ( ref_column ) ] [ ON DELETE { NO ACTION | CASCADE } ] [ ON UPDATE { NO ACTION } ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression ) [ ON { partition_scheme_name ( partition_column_name ) | filegroup | "default" } ]
] <column_set_definition> ::=
column_set_name XML COLUMN_SET FOR ALL_SPARSE_COLUMNS< table_constraint > ::=
[ CONSTRAINT constraint_name ]
{ { PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] (column [ ASC | DESC ] [ ,...n ] ) [ WITH FILLFACTOR = fillfactor |WITH ( <index_option> [ , ...n ] ) ][ ON { partition_scheme_name (partition_column_name)| filegroup | "default" } ] | FOREIGN KEY ( column [ ,...n ] ) REFERENCES referenced_table_name [ ( ref_column [ ,...n ] ) ] [ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression )
}
<table_option> ::=
{DATA_COMPRESSION = { NONE | ROW | PAGE }[ ON PARTITIONS ( { <partition_number_expression> | <range> } [ , ...n ] ) ]
}<index_option> ::=
{ PAD_INDEX = { ON | OFF } | FILLFACTOR = fillfactor | IGNORE_DUP_KEY = { ON | OFF } | STATISTICS_NORECOMPUTE = { ON | OFF } | ALLOW_ROW_LOCKS = { ON | OFF} | ALLOW_PAGE_LOCKS ={ ON | OFF} | DATA_COMPRESSION = { NONE | ROW | PAGE }[ ON PARTITIONS ( { <partition_number_expression> | <range> } [ , ...n ] ) ]
}
<range> ::=
<partition_number_expression> TO <partition_number_expression>

ALTER TABLE [ database_name . [ schema_name ] . | schema_name . ] table_name
{ ALTER COLUMN column_name { [ type_schema_name. ] type_name [ ( { precision [ , scale ] | max | xml_schema_collection } ) ] [ COLLATE collation_name ] [ NULL | NOT NULL ] [ SPARSE ]| {ADD | DROP } { ROWGUIDCOL | PERSISTED | NOT FOR REPLICATION | SPARSE }} | [ WITH { CHECK | NOCHECK } ]| ADD { <column_definition>| <computed_column_definition>| <table_constraint> | <column_set_definition> } [ ,...n ]| DROP {[ CONSTRAINT ] { constraint_name [ WITH ( <drop_clustered_constraint_option> [ ,...n ] ) ] } [ ,...n ]| COLUMN {column_name } [ ,...n ]} [ ,...n ]| [ WITH { CHECK | NOCHECK } ] { CHECK | NOCHECK } CONSTRAINT { ALL | constraint_name [ ,...n ] } | { ENABLE | DISABLE } TRIGGER { ALL | trigger_name [ ,...n ] }| { ENABLE | DISABLE } CHANGE_TRACKING [ WITH ( TRACK_COLUMNS_UPDATED = { ON | OFF } ) ]| SWITCH [ PARTITION source_partition_number_expression ]TO target_table [ PARTITION target_partition_number_expression ][ WITH ( <low_lock_priority_wait> ) ]| SET ( FILESTREAM_ON = { partition_scheme_name | filegroup | "default" | "NULL" } )| REBUILD [ [PARTITION = ALL][ WITH ( <rebuild_option> [ ,...n ] ) ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_option> [ ,...n ] ) ]]]| <table_option>| <filetable_option>}
[ ; ]

ALTER TABLE [dbo].[Product] ADD [UnitPrice] DECIMAL(18,2) NULL

ALTER TABLE [dbo].[Product] ADD [UnitsInStock] INT NULL, [UnitsOnSale] INT NULL

ALTER TABLE [dbo].[Product] ALTER COLUMN [ProductName] VARCHAR(100) NOT NULL

ALTER TABLE [dbo].[Product] DROP COLUMN [UnitPrice]

DROP TABLE [ database_name . [ schema_name ] . | schema_name . ]
table_name [ ,...n ][ ; ]

USE [Portal]
GO
SELECT * FROM INFORMATION_SCHEMA.TABLES
GO

EXEC sp_help <name>

EXEC sp_help Product