MDX計算所有時間的計算總計

Question

我開發了一個SSRS報表的MDX查詢，該報表具有一個名爲CurrentMonthAndAllOfLastYear的計算度量值，它應該將當前月份的淨銷售額與前一年的淨銷售額相加。不幸的是，計算出來的測量似乎總是總計每個淨銷售額。在MDX是：

WITH 
SET [CurrMonth] AS [Sales Period].[Sales Period].CurrentMember --Month 
SET [CurrYear] AS ANCESTORS([CurrMonth](0), 2) --Year 
SET [PriorYear] AS [CurrYear](0).LAG(1) -- Gets prior Year 

MEMBER [Measures].[CurrentMonthAndAllOfLastYearAmt] AS SUM({[CurrMonth], [PriorYear]}, Measures].[Net Sales]) 
MEMBER [Measures].[Debtors Collection Days] AS ([Measures].[Total Owing Amount] * 90)/[Measures].[CurrentMonthAndAllOfLastYearAmt] 

SELECT 
{ 
[Measures].[CurrentMonthAndAllOfLastYearAmt], 
[Measures].[Total Owing Amount], 
[Measures].[Debtors Collection Days], 
[Measures].[Net Sales] } ON COLUMNS, 
{ 
[Sales Period].[Sales Month].[Sales Month].ALLMEMBERS } ON ROWS 
FROM (SELECT (YTD(STRTOMEMBER('[Sales Period].[Sales Period].[Sales Month].&[2013-05-31T00:00:00]'))) ON COLUMNS 
FROM (SELECT (STRTOSET('[Sales Representative Mirror].[Sales Representative ID].&[261]')) ON COLUMNS 
FROM [Sales])) 

的MDX片斷產生如下：

Sales Month CurrentMonthAndAllOfLastYearAmt 
31/01/2013 $320,429.60 ... 
28/02/2013 $320,429.60 ... 
31/03/2013 $320,429.60 ... 
30/04/2013 $320,429.60 ... 
31/05/2013 $320,429.60 ... 

我需要下面的輸出（有沒有在2012年的任何銷售）：

Sales Month CurrentMonthAndAllOfLastYearAmt 
31/01/2013 $0.00 ... 
28/02/2013 $0.00 ... 
31/03/2013 $0.00 ... 
30/04/2013 $18,931.10 ... 
31/05/2013 $22,557.22 ... 

任何幫助非常感謝。

Answer 1

我不會使用一組來執行此操作，但使用ParallelPeriod MDX功能。

MEMBER [Measures].[CurrentMonthAndAllOfLastYearAmt] AS 
    ([Sales Period].[Sales Period].CurrentMember,[Measures].[Net Sales]) 
    + 
    (ParallelPeriod([CurrMonth](0), 1, [Sales Period].[Sales Period].CurrentMember), [Measures].[Net Sales]) 

好的問題是每次使用集合或每個MDX請求一次就評估集合。之後，你有上下文（使用或不在哪裏和子查詢上下文）。