删除表中重复数据

Posted mb62caa7d6f2477

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了删除表中重复数据相关的知识，希望对你有一定的参考价值。


delete from  t_major

where

speciality in (select speciality from (select speciality from t_major group by speciality having count(speciality) > 1) a)

and

id not in (select pid from (select min(id) as pid from t_major group by speciality having count(speciality) > 1 ) b)


以上是关于删除表中重复数据的主要内容，如果未能解决你的问题，请参考以下文章