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(87) 评论(0) 推荐(0) 编辑