SQL Server組問號

我有如下表：SQL Server組問號

CREATE TABLE #weeks(
    ProposalLineWeekID INT, 
    StartWeek DATETIME, 
    EndWeek DATETIME, 
    Selected BIT, 
    WeekNumber INT 
)

如何獲取所有具有重複WeekNumber項ProposalLineWeekID值？例如

ProposalLineWeekID, WeekNumber 
------------------------------ 
2     22 
3     6 
4     22

我想獲得ProposalLineWeekID 2和4伴隨WeekNumber。

來源

2011-02-02 AngryHacker

試試這個：

SELECT ProposalLineWeekID, WeekNumber 
FROM #Weeks 
WHERE WeekNumber IN 
( 
    SELECT WeekNumber 
    FROM #weeks 
    GROUP BY WeekNumber 
    HAVING COUNT(*) > 1 
)

子查詢中找出所有重複的星期數和外部查詢取出相應行。

來源

2011-02-02 18:41:34

+1，這也能發揮作用。不知道我的或你的解決方案哪一個在實踐中表現會更好。 – 2011-02-02 18:53:32

如果我理解正確的話，我想這是你想要什麼：

SELECT DISTINCT w1.ProposalLineWeekID, w1.WeekNumber 
FROM weeks w1 
INNER JOIN weeks w2 ON w2.WeekNumber = w1.WeekNumber 
    AND w2.ProposalLineWeekID <> w1.ProposalLineWeekID

來源

2011-02-02 18:43:56

+1，但你可能想要在給定週數重複兩次以上的情況下將WeekNumber（OP要求的）和DISTINCT添加到`SELECT`子句 – 2011-02-02 18:49:29

SQL Server組問號

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