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 代码如下: select * from people where peopleId in (select peopleId from people group by peopleId having count(people 阅读全文
posted @ 2016-11-03 17:02 HappyEDay 阅读(983) 评论(0) 推荐(0) 编辑