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 rowid in (select min(rowid) from people group by peopleId having count(peopleId )>1)
delete from people where rowid in (select min(rowid) from people group by peopleId having count(peopleId )>1)