Question

Suppose, I have a table like this-

Code  | something
------------------
C01     abc
C02     mnt
C03     lkj
C01     dhl
C04     poi
C05     gtr
C02     rty
C01     asd
-------------------

Now, I want only those rows from the table, which rows have Code more than once in that column. So, output will be like-

Code  | something
------------------
C01     abc
C01     dhl
C01     asd
C02     mnt
C02     rty
-------------------  

I’m new with sql server and query things. Please, help me out.
Thanks in advance.

Answer 1

SELECT * FROM Table
WHERE code IN (
    SELECT Code FROM Table
    GROUP BY Code HAVING COUNT(*) > 1
)