MYSQL 查询和删除重复记录的方法很多，下面就为您介绍几种最常用的 MYSQL 查询和删除重复记录的方法，希望对您查询和删除重复数据方面能有所帮助。SQL重复记录查询的几种方法： 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 people where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) 2. 删除表中多余的重复记录，重复记录是根据单个字段（peopleId）来判断，只留有 rowid 最小的记录 delete from people where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) and rowid not in ( select min(rowid) from people group by peopleId having count(peopleId)>1) 3. 查找表中多余的重复记录（多个字段） select * from vitae a where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1) 4. 删除表中多余的重复记录（多个字段），只留有 rowid 最小的记录 delete from vitae a where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1) and rowid not in ( select min(rowid) from vitae group by peopleId,seq having count(*)>1)5. 查找表中多余的重复记录（多个字段），不包含 rowid 最小的记录 select * from vitae a where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1) and rowid not in ( select min(rowid) from vitae group by peopleId,seq having count(*)>1) 以上 SQL 记录重复数据查询和删除方法，希望能够帮助你。
