[Err] 1093 - You can't specify target table 'm_ship_information' for update in FROM clause[Err] 1093

最新推荐文章于 2023-10-13 11:28:25 发布

Burgess_Lee

最新推荐文章于 2023-10-13 11:28:25 发布

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分类专栏： mysql 学习测试异常信息记录-Java

本文链接：https://blog.youkuaiyun.com/Burgess_Lee/article/details/88395767

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本文解决了一种常见的SQL错误：在尝试删除具有重复名称的记录时，因目标表出现在FROM子句中而引发的报错。通过重命名子查询，成功在MySQL中执行了删除重复记录的操作。

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报错信息

今天写了一个sql语句，操作提示

[Err] 1093 - You can't specify target table 'm_ship_information' for update in FROM clause[Err] 1093

语句如下

DELETE
FROM
    people
WHERE
    peopleName IN (
        SELECT
            peopleName
        FROM
            people
        GROUP BY
            peopleName
        HAVING
            count(peopleName) > 1
    )
AND peopleId NOT IN (
    SELECT
        min(peopleId)
    FROM
        people
    GROUP BY
        peopleName
    HAVING
        count(peopleName) > 1
)

不过在Oracle中执行是没有问题的

解决方案

对子查询进行重命名处理，比如同样的效果处理如下：

DELETE
FROM
    people
WHERE
    peopleName IN (
        select a.name from
        (SELECT
            peopleName name
        FROM
            people
        GROUP BY
            peopleName
        HAVING
            count(peopleName) > 1) a
    )
AND peopleId NOT IN (
    select b.id from
    (SELECT
        min(peopleId) id
    FROM
        people
    GROUP BY
        peopleName
    HAVING
        count(peopleName) > 1) b
)

解决问题。