Mysql 如何删除同表中重复的数据? RT 表中ID 唯一, name存在重复 如何删除name重复的记录 保留一条数据 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 \delete from tt a where not exists(select 1 from tt where a.name=name and a.id>id) ordelete tt from tt inner join (select name,min(id) as mi from tt) bon tt.name=b.tt and tt.id>b.mi delete a from table1 a left join (select min(id) from table1 group by name) b on a.id=b.id ordelete tt from tt inner join (select name,min(id) as mi from tt group by name) bon tt.name=b.name and tt.id>b.mi 需要加上条件。 where b.id is nulldelete a from table1 a left join (select min(id) from table1 group by name) b on a.id=b.id where b.id is null delete from table where ID not in (select max(id) from table group by name) create temporary table asd1select id from t a where exists(select 1 from t where a.name=name and a.id >id)delete t from t,asd1where t.id =asd1.id mysql ■tab建自动完成 如何开启? mysql大神帮帮忙 mysql delete 数据还原 mysql 访问 mysql 怎么实现 请教:乱序操作MySQL性能下降很快,不知是何原因? 怎样从Windows命令行启动MySQL???? 我有一张书籍表有作者A列和作者B类..... 关于mysql中的limit的问题 跪求[怎么解决asp代码读取mysql中文数据显示成?????] 我要做自增型的字符串,该怎么做? 请教一个问题,期待过来人给带你建议…… 高分请教如何终止mysql正在执行的任务
delete from tt a where not exists(select 1 from tt where a.name=name and a.id>id)
delete tt from tt inner join (select name,min(id) as mi from tt) b
on tt.name=b.tt and tt.id>b.mi
delete tt from tt inner join (select name,min(id) as mi from tt group by name) b
on tt.name=b.name and tt.id>b.mi
delete a from table1 a left join (select min(id) from table1 group by name) b on a.id=b.id where b.id is null
select id from t a where exists(select 1 from t where a.name=name and a.id >id)delete t from t,asd1
where t.id =asd1.id