用SQL语句实现，查询数据库中重复的记录，怎么能查询出来？
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select 字段,count(*) from 表 group by 字段 having count(*)> '1 '
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如果查全部记录.假设重复记录字段为ID
select * from tb where id in (select id from tb group by id having count(*)> 1)
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一楼正解:select 字段,count(*) from 表 group by 字段 having count(*)> 1