织梦网站MYSQL查询重复记录的方法

,1、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,select * from people   ,where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) , ,2、删除表中多余的重复记录，重复记录是根据单个字段（peopleId）来判断，只留有rowid最小的记录  ,delete from people   ,where peopleId in (select peopleId from people group by peopleId   having count(peopleId) > 1)   ,and rowid not in (select min(rowid) from people group by peopleId having count(peopleId )>1)   , ,3、查找表中多余的重复记录（多个字段）,select * from vitae a   ,where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)   , ,4、删除表中多余的重复记录（多个字段），只留有rowid最小的记录,delete from vitae a   ,where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)   ,and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1)   , ,5、查找表中多余的重复记录（多个字段），不包含rowid最小的记录,select * from vitae a   ,where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)   ,and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1)