摘要：
转载自：http://hi.baidu.com/egainwoo/blog/item/517bbc0a79d4191495ca6b90.html 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 havi... 阅读全文
posted @ 2010-04-13 11:58
shpchan
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