2011年7月23日
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*frompeoplewherepeopleIdin(select peopleIdfrom peoplegroupby peopleIdhavingcount(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deletefrompeoplewherepeopleIdin(select peopleIdfrompeoplegroupby peopleIdhavingcount(peopleId)>1)androwid 阅读全文
posted @ 2011-07-23 09:30 清山博客 阅读(136) 评论(0) 推荐(0)