0

我有以下查询，它从表中生成结果的子集。这些结果约为 3000，状态表中有 ~230,000 个 roes：

SELECT ms1.* FROM STATUS MS1
INNER JOIN
(
    SELECT MS.EndDate as MDT, MS.ID, MS.StatusID, MS.StartDate  
    FROM MEMBER M
    INNER JOIN STATUS MS ON MS.ID = M.ID 
    AND MS.StartDate =(SELECT MAX(StartDate) FROM STATUS WHERE STATUS.ID = M.ID)
    WHERE MS.EndDate IS NOT NULL
    GROUP BY MS.ID, MS.StatusID, MS.EndDate, MS.StartDate ) MS2
ON MS1.ID = ms2.ID AND MS1.StatusID = MS2.StatusID

我要更新的正是这些从查询返回的记录。然后我接受上面的查询并将其包装在更新语句中，如下所示：

UPDATE STATUS 
SET EndDate = NULL
WHERE EXISTS 
(
INNER JOIN
(
    SELECT MS.EndDate as MDT, MS.ID, MS.StatusID, MS.StartDate  
    FROM MEMBER M
    INNER JOIN STATUS MS ON MS.ID = M.ID 
    AND MS.StartDate =(SELECT MAX(StartDate) FROM STATUS WHERE STATUS.ID = M.ID)
    WHERE MS.EndDate IS NOT NULL
    GROUP BY MS.ID, MS.StatusID, MS.EndDate, MS.StartDate ) MS2
ON MS1.ID = ms2.ID AND MS1.StatusID = MS2.StatusID
)

我违反了一条不在上面原始选择中的记录的唯一键约束，因此更新正在尝试更新我不希望它更新的行。我得到的信息是：

违反 UNIQUE KEY 约束“UK_status_ID_ENDDATE”。无法在对象“dbo.STATUS”中插入重复键。重复键值为 (3, )。

我不确定我做错了什么。

4

1 回答 1

0

尝试类似下面的东西

update MS
set
    MS.EndDate = NULL
from
    MEMBER M
    INNER JOIN STATUS MS 
        ON MS.ID = M.ID 
        AND MS.StartDate = ( SELECT MAX(StartDate) FROM STATUS WHERE STATUS.ID = M.ID )
WHERE 
    MS.EndDate IS NOT NULL
于 2013-10-08T20:31:29.007 回答