06 2012 档案

SQL重复记录查询
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 peoplewhere peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) 阅读全文
posted @ 2012-06-26 14:34 Wilson_Chan 阅读(92) 评论(0) 推荐(0)