GROUP BY Problem When Using a SELECT for a column

Question

I have a very complex query that has, as one column, a SELECT clause. Here is a very simplified example from EMP/DEPT to illustrate what I need.
This query works fine without the GROUP BY:
select empno,
(select dname
from dept
where e.deptno = dept.deptno)
from emp e;
How can a GROUP BY be applied to this? The following get a subquery error (not allowed in the GROUP BY).
select empno,
(select dname
from dept
where e.deptno = dept.deptno)
from emp e
group by empno,
(select dname
from dept
where e.deptno = dept.deptno)
And, of course, you can't use column numbers or aliases in the GROUP BY.
Thanks.

Answer 1

Eric's solution is not needed in the simple join you posted
I believe he was well aware of that.Although I realize that Ben was aware of that, in the interest of completeness, I said that for the benefit of any others that may have jumped into the middle of the thread. I didn't mean for it to sound like anything other than that. Sorry for any possible mis-interpretation.