首页 > 数据库技术 > 详细

mysql:You can't specify target table 'bpm_tksign_data' for update in FROM clause

时间:2016-03-08 13:25:53      阅读:252      评论:0      收藏:0      [点我收藏+]
UPDATE bpm_tksign_data
SET iscompleted = 1
WHERE
    actinstid = ‘10000002433415‘
AND nodeid = ‘SignTask1‘
AND iscompleted = 0
AND batch = (
    SELECT
        max(a.batch) m
    FROM
        bpm_tksign_data a
    WHERE
        a.actinstid = ‘10000002433415‘
    AND a.nodeid = ‘SignTask1‘
);

这种写法,mysql各个版本都不支持。

UPDATE bpm_tksign_data
SET iscompleted = 1
WHERE
    actinstid = ‘10000002433415‘
AND nodeid = ‘SignTask1‘
AND iscompleted = 0
AND batch = (
    SELECT
        max(a.batch) m
    FROM
        (SELECT * FROM bpm_tksign_data) a
    WHERE
        a.actinstid = ‘10000002433415‘
    AND a.nodeid = ‘SignTask1‘
);

 这种写法,mysql 5.6支持,mysql 5.7不支持。

UPDATE bpm_tksign_data
SET iscompleted = 1
WHERE
    actinstid = ‘10000002433415‘
AND nodeid = ‘SignTask1‘
AND iscompleted = 0
AND batch = (
    SELECT
        p.m
    FROM
        (
            SELECT
                max(a.batch) m
            FROM
                bpm_tksign_data a
            WHERE
                a.actinstid = ‘10000002433415‘
            AND a.nodeid = ‘SignTask1‘
        ) p
);

这种写法,mysql各个版本都可以支持。

mysql:You can't specify target table 'bpm_tksign_data' for update in FROM clause

原文:http://www.cnblogs.com/kzfy/p/5253531.html

踩
(0)
赞
(0)
   
举报
评论 一句话评论(0)
关于我们 - 联系我们 - 留言反馈 - 联系我们:wmxa8@hotmail.com
© 2014 bubuko.com 版权所有
打开技术之扣,分享程序人生!