Mysql删除重复数据

//查出所有的content唯一的最小id

create table tmp as select min(id) as col1 from test group by content;

//删除重复数据
delete from test where id not in (select col1 from tmp);

//删除临时表
drop table tmp;

参考：http://blog.csdn.net/anya/article/details/6407280

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