發現的總

Question

SELECT I.[Order Number], SUM(CAST([Ext Price] AS FLOAT)) AS Rev 
     FROM stg.Invoices I 
     where i.[order number] = '64100097' 
     GROUP BY I.[Order Number] 

每一行的百分比給我：

Order Number Rev 
64100097 124079.33 

當我嘗試使用，讓每線收入的％：

SELECT StgID, 
CAST((CAST([Ext Price] AS FLOAT))/(NULLIF(Rev,0)) AS FLOAT) 
FROM stg.Invoices I 
JOIN (
     SELECT I.[Order Number], 
     SUM(CAST([Ext Price] AS FLOAT)) AS Rev 
     FROM stg.Invoices I 
     where i.[order number] = '64100097' 
     GROUP BY I.[Order Number] 
) as TotRev on I.[Order Number] = TotRev.[Order Number] 

我得到這個：

StgID RevPct 
7006418 0.202934687026437 
7006427 0.000460995397057673 
7006417 0.0274442971282969 
7006426 0.000415379418957211 
7006422 0.0312703171430729 
7006425 0.000609287622684616 
7006424 0.0161187201768417 
7006420 0.197365669205338 
7006419 0.226870986489047 
7006428 0.000134752500678397 
7006421 0.10299056256993 
7006423 0.193384345321658 

其中總計高達：.08333333333

這不應該加1嗎？

我不明白爲什麼我不能讓每一行的總和達到100％。

這裏是證明所有的人都應該加起來總：

select stgid, [ext price] 
from stg.Invoices 
where [order number] = '64100097' 


stgid ext price 
7006420 24489 
7006418 25180 
7006427 57.2 
7006417 3405.27 
7006426 51.54 
7006421 12779 
7006423 23995 
7006422 3880 
7006425 75.6 
7006424 2000 
7006419 28150 
7006428 16.72 

Answer 1

使用窗口功能：

SELECT I.[Order Number], SUM(CAST([Ext Price] AS FLOAT)) AS Rev , 
     SUM(CAST([Ext Price] AS FLOAT))/NULLIF(SUM(SUM(CAST([Ext Price] AS FLOAT))) OVER(), 0) as p_rev 
FROM stg.Invoices I 
WHERE i.[order number] = '64100097' 
GROUP BY I.[Order Number];