2010 年 1月 11 日随笔档案 - imbob

SQL 查找重复记录

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 co... 阅读全文

posted @ 2010-01-11 17:02 imbob 阅读(288) 评论(0) 推荐(0)