mySQL: delete 语句报错 You can't specify target table 'student' for update in FROM clause(示例

Posted 2020-10-12 HapLe0

delete from  student
where id NOT in (
select min(id) id from student group by name,stuid,subid,subname,score
);

当在mysql中执行这条语句时，报错：You can‘t specify target table ‘student‘ for update in FROM clause；

原因是子查询中使用student表进行查询，而外层的delete语句也是对student进行的操作，因此报错。

解决办法：

将子查询再包装一次：

delete from  student
where id NOT in (
select * from (
select min(id) id from student group by name,stuid,subid,subname,score
)a
);

注意：这种错误只出现在mySQL中。

参考：http://blog.csdn.net/priestmoon/article/details/8016121