Question

I have a User table that has a many records to 1 user relationship. I want to find all the records where the UserId’s are the same and the UserName’s are different.

for example I have tried:

SELECT UserId, UserName, count(*) FROM tblUser
GROUP BY UserId, UserName

This just gives me a list of users and how many times they have that distinct combination of UserId and UserName

so my desired output would be

UserId    | UserName
----------+-----------
1111      | Bob
1111      | JoeBob
2222      | Jimmy
2222      | ILikeTurtles

Answer 1

select *
from tblUser t1
inner join (
  SELECT UserId
  FROM tblUser 
  GROUP BY UserId
  having count(distinct UserName) > 1
) t2
  on t1.UserID = t2.UserID