Mysql 使用MDX中的“不同定义”计算相同度量值的差异

我想计算相同度量值的差异，但“定义不同” 这是我尝试过的，但不起作用：

 WITH MEMBER [Measures].[Births] AS 
'[Measures].[type], [dimType].[TypeL].[Births]' 
 MEMBER [Measures].[Deaths] AS 
'[Measures].[type], [dimType].[TypeL].[Deaths]' 
 MEMBER [Measures].[Population_Growth] AS 
'[Measures].[Births] - [Measures].[Deaths]' 
 SELECT [Measures].[Population_Growth] ON COLUMNS, 
 [dimTime].[year] ON ROWS FROM [Population]

运行此查询时，我得到每年的人口增长率=0。

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我是MDX新手，不知道自己做错了什么？

不确定。在MDX中，您计算了一个元组。如果只有一个成员，则不需要括号，但如果有多个成员，则需要括号。你能试试吗

WITH 
  MEMBER [Measures].[Births] AS ([Measures].[type], [dimType].[TypeL].[Births]) 
  MEMBER [Measures].[Deaths] AS ([Measures].[type], [dimType].[TypeL].[Deaths]) 
  MEMBER [Measures].[Population_Growth] AS [Measures].[Births] - [Measures].[Deaths]
SELECT
 [Measures].[Population_Growth] ON COLUMNS, 
 [dimTime].[year] ON ROWS 
FROM [Population]

如果这不起作用，可能是[type]度量：

WITH 
  MEMBER [Measures].[Births] AS ([Measures].defaultmember, [dimType].[TypeL].[Births]) 
  MEMBER [Measures].[Deaths] AS ([Measures].defaultmember, [dimType].[TypeL].[Deaths]) 
  MEMBER [Measures].[Population_Growth] AS [Measures].[Births] - [Measures].[Deaths]
SELECT
 [Measures].[Population_Growth] ON COLUMNS, 
 [dimTime].[year] ON ROWS 
FROM [Population]

如果这不起作用，我们可以检查成员[dimType].[TYPE].[BARTHINGS]是否正常

WITH 
  MEMBER [Measures].[Population_Growth] AS [dimType].[TypeL].[Births].name
SELECT
 [Measures].[Population_Growth] ON COLUMNS, 
 [dimTime].[year] ON ROWS 
FROM [Population]

这将返回“出生”