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删除重复记录的sql语句
- WBOYOriginal
- 2016-06-07 17:47:401341browse
删除重复记录的sql语句我们提供了两款删除重复记录的sql语句，一种是用id not in来实例，也算是联合查询的方法吧，第二种是临时表来删除重复记录。
删除重复记录的sql语句
我们提供了两款删除重复记录的sql语句，一种是用id not in来实例，也算是联合查询的方法吧，第二种是临时表来删除重复记录。
1),delete from tablename where id not in (select max(id) from tablename group by col1,col2,...)
2),select distinct * into temp from tablename
delete from tablename
insert into tablename select * from temp
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