数据库查重复记录1、查找表中多余的重复记录，重复记录是根据单个字段（peopleId）来判断代码如下:select * from peoplewhere peopleId in (selectpeopleId frompeople group bypeopleId having count(peopleId) > 1)注意：这里的重复是指所有列的数据相同2、删除表中多余的重复记录，重复记录是