按多列分組，SUM在第一個分組按列

Question

我正在編寫一個查詢，它分爲兩列。這意味着，它會將Col1和Col2放入同一組。

我該如何做基於組Col1的記錄SUM？

我有這個至今：http://sqlfiddle.com/#!3/eada2/1

謝謝

Answer 1

我能夠如下解決這個問題：

WITH cteActivityIds (activityId, allDocuByActivity) 
AS 
    (SELECT activityId, COUNT(*) AS allDocuByActivity FROM #ER GROUP BY activityId) 
SELECT 
     E.activityId AS [Actiivty ID], 
     docuType AS [Docu Type], 
     COUNT(docuType), 
     CONVERT(DECIMAL(16,2), (COUNT(docuType) * 100.00/t.allDocuByActivity)) [Total  DocuType in Activity], 
     SUM(CASE WHEN [sent] != '1-1-1900' THEN 1 END) AS [Sent], 
     SUM(CASE WHEN [approved] != '1-1-1900' THEN 1 END) AS [Approved] 
FROM 
     #ER AS E 
INNER JOIN cteActivityIds AS t 
    ON E.activityId = t.activityId 
GROUP BY 
    E.activityId, docuType, t.allDocuByActivity 

感謝

Answer 2

這裏是一個解決方案，在我意見，看起來有點清潔 - 它不需要連接並使用「分區依據」來計算個人計數：

WITH activityCounts as (
    select 
     activityId, 
     docuType, 
     count(activityId) OVER(PARTITION BY activityId) as activityIdCount, 
     count(docuType) OVER(PARTITION BY activityId, docuType) as docuTypeCount, 
     SUM(CASE WHEN [sent] != '1-1-1900' THEN 1 END) OVER(PARTITION BY activityId, docuType) AS [Sent], 
     SUM(CASE WHEN [approved] != '1-1-1900' THEN 1 END) OVER(PARTITION BY activityId, docuType) AS [Approved] 
    from ER 
) 
SELECT 
    activityId, 
    docuType, 
    docuTypeCount, 
    CONVERT(DECIMAL(16,2), (COUNT(docuTypeCount) * 100.00/activityIdCount)) as [Total DocuType in Activity], 
    [Sent], 
    [Approved] 
FROM activityCounts 
GROUP BY 
    activityId, 
    docuType, 
    activityIdCount, 
    docuTypeCount, 
    [Sent], 
    [Approved] 

這裏是一個link to sqlfiddle

Answer 3

你只需要把一個聚合函數上t.allDocuByActivity

MIN(t.allDocuByActivity) AS [Total DocuType in Activity], 

然而，由於您的標籤是DocuType。你不需要DISTINCT？