使用元组函数

元组函数从集中检索元组，或者通过解析元组的字符串表示形式来检索元组。

元组函数（如成员函数和 set 函数）对于协商 Analysis Services 中的多维结构至关重要。

MDX 中有三个元组函数： Current (MDX) 、 Item (元组) (MDX) 和 StrToTuple (MDX) 。以下示例查询说明如何使用这三个函数：

WITH

//Creates a set of tuples consisting of Years and Countries

SET MyTuples AS [Date].[Calendar Year].[Calendar Year].MEMBERS * [Customer].[Country].[Country].MEMBERS

//Returns a string representation of that set using the Current and Generate functions

MEMBER MEASURES.CURRENTDEMO AS GENERATE(MyTuples, TUPLETOSTR(MyTuples.CURRENT), ", ")

//Retrieves the fourth tuple from that set and displays it as a string

MEMBER MEASURES.ITEMDEMO AS TUPLETOSTR(MyTuples.ITEM(3))

//Creates a tuple consisting of the measure Internet Sales Amount and the country Australia from a string

MEMBER MEASURES.STRTOTUPLEDEMO AS STRTOTUPLE("([Measures].[Internet Sales Amount]" + ", [Customer].[Country].&[Australia])")

SELECT{MEASURES.CURRENTDEMO,MEASURES.ITEMDEMO,MEASURES.STRTOTUPLEDEMO} ON COLUMNS

FROM [Adventure Works]

另请参阅