Subquery returning two columns

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Subquery returning two columns

Author

Topic

yeoryuel
Starting Member

9 Posts

Posted - 2009-05-26 : 23:46:55

Select deptno, max(sal) from emp group by deptno)
is my successful subquery.
but it throws error when i tried to give all the details of departmentwise maximum salary holders.
Select * from emp where (deptno, sal) in (Select deptno, max(sal) from emp group by deptno).
am a newbee. is my query illegible? ThanX.

Success Code:
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khtan
In (Som, Ni, Yak)

17689 Posts

Posted - 2009-05-26 : 23:55:18

You can't have the subquery returning 2 columns.
use INNER JOIN


select e.*
from   emp e
       inner join
       (
           select deptno, max_sal = max(sal)
           from   emp
           group by deptno
       ) m on  e.dept_no = m.dept_no
           and e.sal     = m.max_sal

KH
[spoiler]Time is always against us[/spoiler]

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