sqlite 的去重
发布时间:2020-12-12 18:52:25 所属栏目:百科 来源:网络整理
导读:1) 找到重复的记录,归类到一个新表里面 max(id) 是想要删除的record create table ttt as select gallery_url, max (id) as theid from gallery group by gallery_url having count ( * ) = 2 ? 2) 删除 delete from gallery where id in ( select theid
1) 找到重复的记录,归类到一个新表里面 max(id) 是想要删除的record create table ttt as select gallery_url,max(id) as theid from gallery group by gallery_url having count(*) >=2 ? 2) 删除 delete from gallery where id in ( select theid from ttt) (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |