SQL Server查询重复数据

时间：2019-03-07 19:03:12 阅读：147 评论：0 收藏：0 [点我收藏+]

1.查询单列重复：

 select * from test
 where name in (select name from test group by name having count
 (name) > 1)

2.查询多列重复:

SELECT a.* FROM test a,(
SELECT name,code
FROM test 
GROUP BY name,code
HAVING COUNT(1)>1

) AS b
WHERE a.name=b.name AND a.code=b.code

原文：https://www.cnblogs.com/Nigel/p/10491370.html

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