how to write Sql query

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hi ,
i am facing problem to writing sql query

staff table

staff_id staff_name dept_id gender salaries
1 A 1 M 10
2 B 1 M 20
3 c 2 F 30
4 D 2 F 40
5 E 1 F 50

Department table

dept_id dept_name
1 Radiology
2 Cardiology

O/P required

dept_name sum male salary sum female salary
Radiology 30 50
Cardiology _ 70

please help me.

thanks in advance...

Posted 8-Jul-12 21:20pm

Srivastava allahabad

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Vasim889 · Answer 1 · 2012-07-08T23:27:00

Solution 1

SQL

select R.SUM(Salaries ),R.gender ,R.dept_name(select D.dept_name,S.Salaries,S.gender from   staff S left outer join  
Department D on (D.ID=s.dept_id ) where S.gender='M'  )as R group by R.dept_name

Posted 8-Jul-12 23:27pm

Vasim889

__TR__ · Answer 2 · 2012-07-09T00:01:00

SQL

SELECT dept_name, [sum male salary], [sum female salary]
FROM Department D
LEFT JOIN
(
    SELECT SUM(Salaries) AS [sum male salary],dept_id  FROM Staff
    GROUP BY dept_id, gender
    HAVING gender = 'M'
) M ON D.dept_id = M.dept_id
LEFT JOIN
(
    SELECT SUM(Salaries) AS [sum female salary],dept_id  FROM Staff
    GROUP BY dept_id, gender
    HAVING gender = 'F'
) F ON D.dept_id = F.dept_id