Question

Here is the problem.

select count(studentID) AS count from educators where count  > 1 group by studentid  

Will not work as SQL Server does not yet know about the count column.

So I have to do this

select *
  from (select count(StudentID) as count
          from educators
         group by studentid
       ) s
 where s.count > 1

Is there a more elegant solution? It seems like there should be a much nicer way to do this.

Answer 1

You could use the HAVING clause, maybe something like this:

SELECT StudentID, COUNT(StudentID)
FROM educators
GROUP BY StudentID
HAVING COUNT(StudentID) > 1

The query will display all StudentIDs that appear more than once.