一、查找表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断html
select * from people where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1)
二、查找表中多个字段的重复记录sql
select * from vitae a where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)
三、查某一列(或多列)的重复值(只能够查出重复记录的值,不能查出整个记录的信息)ui
查找stuid,stuname重复的记录spa
select stuid,stuname from stuinfogroup by stuid,stunamehaving(count(*))>1
参考资料: sql查询重复记录 http://www.studyofnet.com/news/918.htmlcode