MDX中的通用计算和选择
一： mdx中的元数据引用函数
CurrentMember,Parent,Ancestor(),PrevMember,NextMember,Lag(),Lead(),PeriodsToDate(),ParallelPeriod(),
LastPeriods(),OpeningPeriod(),CloseingPeriod(),Iif()
二：同一层次结构中级别之间的简单比率
1、值相对于全部[All]数值或维度总额成员数据的比率: 查询三级品类占全部的比率
with member [Measures].[Rate] as [Measures].[缺货库存] / ([Measures].[缺货库存],[商品品类.品类Sku].[AllSkus])
SELECT
NON EMPTY {[Measures].[Rate]} ON COLUMNS,
NON EMPTY {[商品品类.品类Sku].[三级品类].Members} ON Rows
FROM [Repertory_Examination]
2、值相对于父对象数值的比率:查询三级品类占二级品类的比率
with member [Measures].[Rate] as [Measures].[缺货库存] / ([Measures].[缺货库存],[商品品类.品类Sku].currentmember.parent)
SELECT
NON EMPTY {[Measures].[Rate]} ON COLUMNS,
NON EMPTY {[商品品类.品类Sku].[三级品类].Members} ON Rows
FROM [Repertory_Examination]
3、值相对于高于父对象的祖先对象的数值的比率
with member [Measures].[Rate] as [Measures].[缺货库存] / ([Measures].[缺货库存],Ancestor([商品品类.品类Sku].currentmember,[商品品类.品类Sku].[三级品类]))
三、均值
1、简单均值：求三个品类的平均值
With Set [商品品类] AS {[商品品类.商品Sku].[737].[738].[749], [商品品类.商品Sku].[737].[738].[750], [商品品类.商品Sku].[737].[738].[751]}
Member [商品品类.商品Sku].[pinlei] AS 'avg( [商品品类] )'
Member [Measures].[差值] as '[Measures].[现货库存]-[Measures].[缺货库存]'
SELECT
{[Measures].[缺货库存],[Measures].[现货库存],[Measures].[差值]} on columns
FROM [Repertory_Examination] where { [商品品类.商品Sku].[pinlei]}
四、基于时间的引用和时间序列的计算
1、各时期的引用和计算 : 计算与上一个时间成员的增长，不受时间成员属于哪个级别的影响
with member [Measures].[increase] as 'iif([Measures].[现货库存]-([时间.年月日].currentMember.prevmember,[Measures].[现货库存])=null,0,[Measures].[现货库存]-([时间.年月日].currentMember.prevmember,[Measures].[现货库存]))'
select
{
[Measures].[increase]
}
on columns,
{
{[时间.年月日].[2015].[11].[16], [时间.年月日].[2015].[11].[17]}
}
on rows
FROM [Repertory_Examination]
2、去年同期的引用和计算（同比去年）
with member [Measures].[increase] as
'[Measures].[现货库存] - ([Measures].[现货库存] -
ParallelPeriod([时间.年月日].[Year],1,[时间.年月日].CurrentMember))'
select
{
[Measures].[increase]
}
on columns,
{
{[时间.年月日].[2015].[11].[16], [时间.年月日].[2015].[11].[17]}
}
on rows
FROM [Repertory_Examination]
3 本年至今的聚合值
with member [Measures].[ytd] as 'Sum(periodsToDate([时间.年月日].[年],[时间.年月日].CurrentMember),[Measures].[库存量])'
SELECT
{[Measures].[ytd]} on columns,
{[时间.年月日].[2015].[11].[14], [时间.年月日].[2015].[11].[15], [时间.年月日].[2015].[11].[16]} on rows
FROM [Repertory_Health_Day]
4 使用lastperiods()选择基于目标成员的时间范围
SELECT
{ [Measures].[库存量]} on columns,
{
LastPeriods (-4,[时间.年月日].[2015].[11].[14])
} on rows
FROM [Repertory_Health_Day]