根据查询结果删除多个表

Question

我们的数据库没有实现 ON DELETE CASCADE 所以我需要创建一个脚本或存储过程来删除多个表中给定查询中 IDs 结果的记录：

我在存储过程中尝试过，但我无法在变量中分配多行：

CREATE PROCEDURE `Delete_card`(IN _status INT)
BEGIN

    SET @IDs = SELECT ID FROM TABLE_ID WHERE Status=_status;
    
    DELETE FROM TABLE_A WHERE ID IN (@IDs);
    DELETE FROM TABLE_B WHERE ID IN (@IDs);
    DELETE FROM TABLE_C WHERE ID IN (@IDs);
    DELETE FROM TABLE_D WHERE ID IN (@IDs);
    DELETE FROM TABLE_E WHERE ID IN (@IDs);
END

Answer 1

您可以使用多table DELETE 语句来完成：

DELETE a, b, c
FROM TABLE_ID t
LEFT JOIN TABLE_A a ON a.id = t.id
LEFT JOIN TABLE_B b ON b.id = t.id
LEFT JOIN TABLE_C c ON c.id = t.id
..................................
WHERE t.Status = ?;

将 ? 更改为您想要的状态值。

查看简化版 demo.

根据查询结果删除多个表

DELETE multiple tables based on a query result

mysql

join

left-join

sql-delete