如何查询mysql数据库中部分重复的数据

你是要查找数据库中某个字段下的相同数据吧，我给你写2个例子

(数据库执行效率高)

select * from dbo.MediafileInfo as a where

(VideoDownUrl IN (SELECT VideoDownUrl FROM MediafileInfo AS B WHERE A.ProgramID <>B.ProgramID))

(数据库执行效率低)

SELECT *

FROM MediafileInfo AS A

WHERE (SELECT COUNT(*) FROM MediafileInfo WHERE VideoDownUrl=A.VideoDownUrl)>1

select * from 表 where n_id in

(select s_name from 表

group by s_name,n_money,s_zhipiao,s_date,s_lixi

having count(s_name)>1)

---