Oracle删除重复记录只保留一条数据的几种方法

一、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sql SELECT * FROM people WHERE peopleid IN ( SELECT peopleid FROM people GROUP BY peopleid HAVING COUNT (peopleid) > 1 ) 二、删除表中多余的重复记录，重复记

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