我的服务器有一张表。
ID PID LASTMODIFIED REASON
1 1 01/01/2011 XYZ
2 1 04/01/2011 XYY
3 2 05/01/2011 ZZZ
4 2 03/01/2011 ABC
我想根据每个项目信息数据库(LASTMODIFIED)选择行。 对于EX,该选择应归还:
ID PID LASTMODIFIED REASON
2 1 04/01/2011 XYY
3 2 05/01/2011 ZZZ
Pelase帮助我发言。 谢谢。
SELECT A.ID, A.PID, A.LastModified, A.Reason
FROM MyTable AS A INNER JOIN (
SELECT PID, MAX(LastModified) AS MaxDate
FROM MyTable
GROUP BY PID) AS B ON A.PID = B.PID AND A.LastModified = B.MaxDate
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