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mysql中You can’t specify target table for update in FROM clause错误解决方法

时间:2021-07-01 10:21:17 帮助过:2人阅读

from tbl where id in ( select max(id) from tbl a where EXISTS ( select 1 from tbl b where a.tac=b.tac group by tac HAVING count(1)>1 ) group by tac )

改写成下面就行了:

delete from tbl where id in 
(
    select a.id from 
    (
        select max(id) id from tbl a where EXISTS
        (
            select 1 from tbl b where a.tac=b.tac group by tac HAVING count(1)>1
        )
        group by tac
    ) a
)

也就是说将select出的结果再通过中间表select一遍,这样就规避了错误。注意,这个问题只出现于mysql,mssql和oracle不会出现此问题。

http://www.jb51.net/article/60926.htm

mysql中You can’t specify target table for update in FROM clause错误解决方法

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