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="t18"()1、查找表中多余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)2、删除表中多余重复记录重复记录是根据单个字段(peopleId)来判断只留有rowid最小记录delete from people where peopleId in (select peopleId from people group by peopleId having count( [阅读全文] [PDF]
--测试数据/*-----------------------------select * from tt-----------------------------*/id pid ----------- ----------- 1 11 12 23 33 33 3(所影响的行数为 6 行)首先,如何查询table中有重复记录select *,count(1) as rownumfrom ttgroup by id, pidhaving count(1) 1id pid rownum ----------- ----------- ----------- 1 1 [阅读全文] [PDF]
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