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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:248      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

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