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几种查找和删除重复记录的方法
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)
复制代码 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)
复制代码 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)
复制代码 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)
复制代码 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)
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