[英]SQL Server Group BY Question
我有下表:
CREATE TABLE #weeks(
ProposalLineWeekID INT,
StartWeek DATETIME,
EndWeek DATETIME,
Selected BIT,
WeekNumber INT
)
如何獲取具有重復的WeekNumber
條目的所有ProposalLineWeekID
值? 例如
ProposalLineWeekID, WeekNumber
------------------------------
2 22
3 6
4 22
我想獲得帶有隨附的WeekNumber的ProposalLineWeekID 2和4。
嘗試這個:
SELECT ProposalLineWeekID, WeekNumber
FROM #Weeks
WHERE WeekNumber IN
(
SELECT WeekNumber
FROM #weeks
GROUP BY WeekNumber
HAVING COUNT(*) > 1
)
子查詢查找所有重復的星期數,外部查詢獲取相應的行。
如果我正確理解,我想這就是你想要的:
SELECT DISTINCT w1.ProposalLineWeekID, w1.WeekNumber
FROM weeks w1
INNER JOIN weeks w2 ON w2.WeekNumber = w1.WeekNumber
AND w2.ProposalLineWeekID <> w1.ProposalLineWeekID
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