[英]Update with MAX() in MySql
代码bellow工作得很好,但......
如何在同一语句中使用带MAX()函数的Update?
类似于:UPDATE Msg SET myTime = NOW()WHERE user ='username'AND myTime = max(myTimp)
SELECT @myId:=(SELECT id FROM Msg
WHERE myTime=(SELECT MAX(myTime) FROM Msg
WHERE user='username'));
UPDATE Msq SET myTime=NOW()
WHERE id=@myId;
UPDATE Msg
SET myTime=NOW()
WHERE user='username'
ORDER BY myTime DESC
LIMIT 1
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.