Select EMP with max SAL from each DEPT

Question

I´m having a bad time with a SQL query. I´m using oracle default tables:

\'EMP\' TABLE

http://imageshack.us/photo/my-images/850/sinttuloxps.png/

AND

Answer 1

Classic greatest-n-per-group query. Here is what you want:

select dept.dname, emp.empno, emp.ename, emp.sal
from emp
inner join dept on emp.deptno = dept.deptno
inner join
(
select emp.deptno, max(emp.sal) sal
from emp
group by emp.deptno
) ss on emp.deptno = ss.deptno and emp.sal = ss.sal
order by emp.sal desc

Here is a working fiddle: http://sqlfiddle.com/#!4/7147b/6

Additionally, you might want to checkout a different approach. Look here (SQL Select only rows with Max Value on a Column) to see an interesting answer on the topic.