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我想了解這個MDX查詢背後的數學。試圖理解mdx計算
TL; DR:這個查詢如何運行? (如何將 「格」 來計算?)
WITH
member [Customer].[Country].[x] as (([Customer].[Country].[Australia]) - ([Customer].[Country].[France], [measures].[sum sales]))
member [measures].[div] as ([Measures].[Sum Sales]/[Measures].[Sum Cost])
SELECT
{ [measures].[div] }
ON COLUMNS,
{ [Customer].[Country].[x] }
ON ROWS
長的故事:
我的[客戶]層次[國家]和措施,銷售和成本。
對於此查詢:
SELECT
{ [Measures].[Sum Sales], [Measures].[Sum Cost] }
ON COLUMNS,
{ [Customer].[Country].[Australia] , [Customer].[Country].[France] }
ON ROWS
我得到的結果是:
Australia: cost = 8266005, sales = 18005422
France: cost = 4478131, sales = 9610041
我創建這個成員:
// substract france from australia
member [Customer].[Country].[x] as (([Customer].[Country].[Australia]) - ([Customer].[Country].[France]))
,並用它運行查詢,而不是2成員:
WITH
member [Customer].[Country].[x] as (([Customer].[Country].[Australia]) - ([Customer].[Country].[France]))
SELECT
{ [Measures].[Sum Sales], [Measures].[Sum Cost] }
ON COLUMNS,
{ [Customer].[Country].[x] }
ON ROWS
,並得到的結果是:
x: cost = 3787874, sales = 8395381
這是有道理的。然後我改變法國使用的銷售中成員,如:
WITH
member [Customer].[Country].[x] as (([Customer].[Country].[Australia]) - ([Customer].[Country].[France], [measures].[sum sales]))
SELECT
{ [Measures].[Sum Sales], [Measures].[Sum Cost] }
ON COLUMNS,
{ [Customer].[Country].[x] }
ON ROWS
這引起了這樣的結果:
x: cost = -1344036, sales = 8395381
,我可以看到,澳大利亞,正在使用從列措施,對於法國來說,元組的銷量是「強勢」的,並且對成本保持着高度的關注。這意味着「成本」減免實際上是(AU,成本) - (FR,銷售)。
因此,我想這(這是問題所在!)
我設置了自定義測量:
member [measures].[div] as ([Measures].[Sum Sales]/[Measures].[Sum Cost])
,並把它列與其他措施:
WITH
member [Customer].[Country].[x] as (([Customer].[Country].[Australia]) - ([Customer].[Country].[France], [measures].[sum sales]))
member [measures].[div] as ([Measures].[Sum Sales]/[Measures].[Sum Cost])
SELECT
{ [Measures].[Sum Sales], [Measures].[Sum Cost], [measures].[div] }
ON COLUMNS,
{ [Customer].[Country].[x] }
ON ROWS
x銷售額和成本的結果是相同的。 「div」= -6.2463950147143。 它是如何計算的? 我猜應該是:
(AU,sales)/(AU,cost) - (FR,sales) = 18005422/8266005 - 9610041 = -9610038.82175
但是,這是錯誤的...
我來自法國
member [Customer].[Country].[x] as (([Customer].[Country].[Australia]) - ([Customer].[Country].[France]]))
拿出銷售,並得到了預期的結果:
div = ((AU,sales) - (FR,sales))/((AU,cost) - (FR,cost)) = (18005422 - 9610041)/(8266005 - 4478131) = 2.216383
感謝您的任何和所有幫助