SQL查询返回包含来自一个字段的重复数据的所有行

Question

我有一张带有卡号和姓名的表。其中一些名称是相同的，这意味着他们有多张牌。如何选择名称多次出现的所有行？

Answer 1

以下可能是您正在寻找的解决方案

Select * from CardTable where cardid in ( select cardid from CardTable group by cardid having count(cardid) > 1)

Answer 2

使用：

  SELECT t.name
    FROM TABLE t
GROUP BY t.name
  HAVING COUNT(*) > 1

Answer 3

以下内容应该有效：

SELECT        * 
FROM cards    c1 
INNER JOIN    cards c2 on c1.name = c2.name 
WHERE         c2.id <> c1.id

Answer 4

select count(*) as n, [name]
from table1
group by [name]
having n > 1

Answer 5

如果您需要整行，这里有一个可以在sql 7及更高版本上运行的解决方案

SELECT t1.* FROM(
 SELECT t.name
    FROM YourTable t
GROUP BY t.name
  HAVING COUNT(*) > 1) t2
  JOIN YourTable t1 on t2.name = t1.name