文章分类 -  SQL

SQL查找列（字段）重复值及操作--整理
摘要：方法一： 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) 阅读全文

posted @ 2017-12-02 16:09 只谈技术

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