Java代碼 ![收藏代碼]()
- delete from sns_hits where id not in （1，2，3）
Java代碼 ![收藏代碼]()
- delete from sns_hits where id not in （select id from another_table）
但是
Java代碼 ![收藏代碼]()
- delete from sns_hits where id not in (select id from sns_hits)
解決棒法是創建臨時表
Java代碼 ![收藏代碼]()
- CREATE TEMPORARY TABLE tmp_sns_hits (
- `id` BIGINT(20)
- )
親自實驗的demo：
DELETE from user WHERE id not in (SELECT id from user WHERE id >4)
----此語句執行報錯[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)
-----執行成功
總結：此種刪除時建立臨時表是關鍵。。。。。