1.  Filter函数

Filter(Set_Expression, Logical_Expression )返回根据搜索条件对指定集进行筛选后得到的集。

Filter 函数对指定集中的每个元组计算指定的逻辑表达式。如果逻辑表达式计算结果为 true，该函数将返回由指定集中的每个元组构成的集。如果所有元组的计算结果都不为 true，则返回一个空集。

Filter 函数的工作方式与 IIf 函数类似。IIf 函数只返回两个选项中的一个，返回哪一个取决于 MDX 逻辑表达式的值；而 Filter 函数返回符合指定搜索条件的元组集。实际上，Filter 函数是对集中的每个元组执行 IIf(Logical_Expression, Set_Expression.Current, NULL)，然后返回所得到的集。

示例1:

SELECT{ ([Measures].[Reseller Sales Amount]), ([Measures].[Internet Sales Amount]) } ON COLUMNS, Filter( {[Product].[Product].[Product].Members}, ([Measures].[Internet Sales Amount]) > ([Measures].[Reseller Sales Amount]) ) ON ROWS FROM [BF_MDX]

效果:

示例2:

SELECT{ ([Measures].[Reseller Sales Amount]), ([Measures].[Internet Sales Amount]) } ON COLUMNS, Filter( {[Product].[Category].children*[Product].[Product].[Product].Members}, ([Measures].[Internet Sales Amount]) > ([Measures].[Reseller Sales Amount]) AND ( [Product].[Category].CurrentMember Is [Product].[Category].[Clothing] OR [Product].[Category].CurrentMember Is [Product].[Category].[Accessories] ) ) ON ROWS FROM [BF_MDX]

效果:

  

示例3:

SELECT{ ([Measures].[Reseller Sales Amount]), ([Measures].[Internet Sales Amount]) } ON COLUMNS, Filter( {[Product].[Category].children*[Product].[Product].[Product].Members}, ([Measures].[Internet Sales Amount]) > ([Measures].[Reseller Sales Amount]) AND NOT ( [Product].[Category].CurrentMember Is [Product].[Category].[Clothing] OR [Product].[Category].CurrentMember Is [Product].[Category].[Accessories] ) ) ON ROWS FROM [BF_MDX]

效果:

  

一些思考

Filter如何取代where切片

扩展思维

with member measures.year as  vbamdx!cint([Date].[Calendar Year].currentmember.properties('key'))

给最左边的mdx语句加上时间限制. 查询只大于等于2003年的数据

2. 组合结果集函数

Union 合并,intersection交集和, Except减去第二个集合

示例1:

SELECT{([Measures].[Reseller Sales Amount])} ON COLUMNS,Union(    TopCount(     {[Product].[Product].[Product].Members},          5,        ([Measures].[Reseller Sales Amount], [Date].[Calendar Year].[CY 2003])    ),

  TopCount(     {[Product].[Product].[Product].Members},          5,            ([Measures].[Reseller Sales Amount], [Date].[Calendar Year].[CY 2004])        ))          ON ROWS       FROM [bf_mdx]

效果1:

  

示例2:

SELECT {([Measures].[Reseller Sales Amount])} ON COLUMNS, Intersect( TopCount( {[Product].[Product].[Product].Members}, 10, ([Measures].[Reseller Sales Amount], [Date].[Calendar Year].[CY 2004]) ), TopCount( {[Product].[Product].[Product].Members}, 10, ([Measures].[Reseller Sales Amount], [Date].[Calendar Year].[CY 2003]) ) ) ON ROWSFROM [BF_MDX]

效果2:

  

示例3:

SELECT {([Measures].[Reseller Sales Amount])} ON COLUMNS, Except(   TopCount( {[Product].[Product].[Product].Members}, 10, ([Measures].[Reseller Sales Amount], [Date].[Calendar Year].[CY 2003]) ), TopCount( {[Product].[Product].[Product].Members}, 10, ([Measures].[Reseller Sales Amount], [Date].[Calendar Year].[CY 2004]) ) ) ON ROWS FROM [BF_MDX]

效果3: