摘要: 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) >  阅读全文
posted @ 2017-02-21 11:18 考虑突破 阅读(1453) 评论(0) 推荐(0) 编辑