Java代码 ![收藏代码]()
- delete from sns_hits where id not in （1，2，3）
Java代码 ![收藏代码]()
- delete from sns_hits where id not in （select id from another_table）
但是
Java代码 ![收藏代码]()
- delete from sns_hits where id not in (select id from sns_hits)
解决棒法是创建临时表
Java代码 ![收藏代码]()
- CREATE TEMPORARY TABLE tmp_sns_hits (
- `id` BIGINT(20)
- )
亲自实验的demo：
DELETE from user WHERE id not in (SELECT id from user WHERE id >4)
----此语句执行报错[Err] 1093 - You can't specify target table 'user' for update in FROM clause
DELETE from user WHERE id not in (SELECT * from (SELECT id from user u WHERE u.id>4)u)
DELETE from user WHERE id not in (SELECT * from (SELECT id from user u WHERE u.id>4)u)
-----执行成功
总结：此种删除时建立临时表是关键。。。。。