【SQL】 java.sql.SQLException: You can't specify target table 'emp' for update in FROM clause

在执行sql：

delete from emp where id in (select id from emp where cdate<'2018-02-02')

时报出以下异常：

### The error occurred while setting parameters
### SQL: delete from emp where id in (select id from emp where cdate<?)
### Cause: java.sql.SQLException: You can't specify target table 'emp' for update in FROM clause
 INFO [main] - Time elapsed:10s.

错误原因：不能先将select出表中的某些值，再update这个表

解决方案：将SQL修改如下：

delete from emp where id in (select id from (select id from emp where cdate<'2018-02-02') as tb)

--END-- 2019年10月14日10:17:27