03 2014 档案

表中相同数据的sql语句
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)2、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 peoplewhere peopleId in (select peopleId from people group by peopleId having coun 阅读全文
posted @ 2014-03-24 13:03 Struts-pring 阅读(275) 评论(0) 推荐(0)