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小疑点大学问求解决方法

发布时间: 2012-02-03 22:02:47 作者: rapoo

小问题,大学问,求解决办法
一张表TABLE,里面有1万条数据,字段ID,CONTENT,其中有些记录ID是一样的,现在求一条SELECT语句,能够取出字段ID重复的所有记录,谢谢

[解决办法]
select *
from 表名
where id in (select id from 表名 group by id having count(*)> 1)
[解决办法]
一张表TABLE,里面有1万条数据,字段ID,CONTENT,其中有些记录ID是一样的,现在求一条SELECT语句,能够取出字段ID重复的所有记录,谢谢

--取ID
select distinct id from tb group by id having count(*) > 1
--取ID,content
select * from tb where id in (select distinct id from tb group by id having count(*) > 1)
[解决办法]
select * from tb
where ID in (select ID from tb as t group by ID having(count(1)> =2))
[解决办法]
--1
select * from 表 where id in (select id from 表 group by id having(count(*))> 1)

--2
select * from 表 a where exists (select 1 from 表 where id=a.id group by id having(count(*))> 1)

--2
select * from 表 a where not exists (select 1 from 表 where id=a.id group by id having(count(*))=1)

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