Question

说我有一张表如下

Employee    RecNumber
Joe Bloggs  123456
Joe Bloggs  123456
Bob Bloggs  123457
Dup Bloggs  123456

我只想返回所有Rec Number，其中2人拥有相同的RecNumber，这不应该发生。请注意，一个人可以多次拥有相同的请求编号，我只想要返回，其中2个人具有相同的编号

所以我想要的就是

Answer 1

select record_number
  from my_table
  group by record_number
  having count(distinct employee) > 1

Answer 2

SELECT A.RECNUMBER,COUNT(B.EMPLOYEE)
(SELECT DISTINCT RECNUMBER FROM YOURTABLE) A,
YOURTABLE B
WHERE A.RECNUMBER = B.RECNUMBER
GROUP BY A.RECNUMBER
HAVING COUNT(B.EMPLOYEE)=2;

Answer 3

这样的东西？

SELECT RecNumber FROM Table GROUP BY RecNumber HAVING COUNT(*) > 1

Answer 4

SELECT RecNumber FROM [a table] 
 GROUP BY RecNumber HAVING COUNT(*) > 1;

或者

SELECT RecNumber FROM (SELECT RecNumber, Employee
  FROM [a table] 
 GROUP BY RecNumber, Employee HAVING COUNT(*) > 1
) AS x;

Answer 5

你可以写类似的东西，我认为它有效：

use *DATABASE_NAME*
go
select *Your_Field*, Nbre=count(*Your_Field*) from *TABLE_NAME* 
group by *Your_Field*
having count(*Your_Field*)>1
order by 2 desc

享受

SQL Server查找重复项

5 个答案: