How to use single column in a group by clause

hi frs
i hve used sum function in a sql how to use a single column in a query.
for ex
select sum(sal),ename,job,deptno,empno from emp
group by deptnowhether its possible to use single column in a group by class.
i want like this because in my custom report i need it. Report query has more than 30 column so its not possible to use 30 columns in a group by.
pls help.
Thanks
Rajesh

Maybe something like this -
Select ename, job, deptno, empno, sal, col1, col2, col3, col4 ......, coln
From
Select SUM(sal) sal, deptno deptno_i
From Emp
Group By deptno
,Emp
Where deptno = deptno_i
Shailender Mehta

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