You can't specify target table '表名' for update in FROM clause”解决方法

标签：targe   get   gid   travel   target   desc   upd   HERE   tab   

You can‘t specify target table ‘表名‘ for update in FROM clause

翻译为：不能先select出同一表中的某些值，再update这个表。

错误语句：

update w_workitems ww set ww.endTime = ww.createTime where ww.gid in(
select * from a_travel a ,w_workitems b where a.instance_id = b.instanceId and a.apply_status = ‘2‘
and a.id>‘202001‘ and b.endTime is null ORDER BY b.createTime desc;

修改后：

UPDATE w_workitems ww
SET ww.endTime = ww.createTime
WHERE
ww.gid IN (
SELECT
aa.gid
FROM
(
SELECT
b.*
FROM
a_travel a,
w_workitems b
WHERE
a.instance_id = b.instanceId
AND a.apply_status = ‘2‘
AND a.id > ‘202001‘
AND b.endTime IS NULL
ORDER BY
b.createTime DESC
) aa
);

You can't specify target table '表名' for update in FROM clause”解决方法

标签：targe   get   gid   travel   target   desc   upd   HERE   tab   

原文地址：https://www.cnblogs.com/zxHu/p/12636128.html