MySQL 相关项目
› MariaDB
› Drizzle
参考文档
› http://mysql-python.sourceforge.net/MySQLdb.html
delete from demo_user where id in(
//获取重复记录的 id
select id from demo_user
where id > any (select id from demo_user where age in (select age from demo_user group by age having count(age) > 1))
and id <= some (select id from demo_user where age in (select age from demo_user group by age having count(age) > 1))
);
报了 error: You can't specify target table 'demo_user' for update in FROM clause
 |
1
20150517 Nov 19, 2016  3
先要删的记录先 insert into xxxx (select xxx from xxxx)
然后再 delete from xxx where id in (select xxx from xxxx) |
 |
2
Layne Nov 19, 2016
楼上说的这是流着泪积累的经验，楼主你值得拥有。。
|
 |
3
ihuotui Nov 19, 2016 via Android
就是用一个 id 唯一索引的表保存一次，然后改表名，即有备份又得到结果
|
 |
4
dalang Nov 19, 2016 via iPhone
我一般都是先把要操作的 table duplicate 一份
|
 |
7
rockpk008 Nov 19, 2016 via iPhone
一楼绝壁有过故事
|
Select Language