mdx - “后代”和“0，叶子”是什么意思？

Question

我有以下 MDX 查询：

select {[Measures].[Internet Sales Amount]} on axis(0), 
DESCENDANTS({[Customer].[Education].[All Customers].[Bachelors],
             [Customer].[Education].[All Customers].[Graduate Degree]},0,LEAVES) on axis(1) ,
DESCENDANTS({[Geography].[Country].[All Geographies].[Australia],
         [Geography].[Country].[All Geographies].[Canada],
         [Geography].[Country].[All Geographies].[France]},0,LEAVES) on axis(2) 
from [Adventure Works]

是什么DESCENDANTS意思0, LEAVES？

Answer 1

Sounds a strange (generated?) request; it means to return the descendants of the members (specified as the first parameter) in the level of those members. I guess this is equivalent to 0, SELF in that case and therefore equivalent of the members passed as parameter:

{
 [Geography].[Country].[All Geographies].[Australia],
 [Geography].[Country].[All Geographies].[Canada],
 [Geography].[Country].[All Geographies].[France]
}