Get more column in Group by query....

Question

select np.netting_profile, max(np.effective_date) from netting_profile np
where np.profile_run_time_date=to_timestamp('2010-11-18 18:00:00','yyyy-MM-dd HH24:MI:SS') and
np.effective_date <= to_timestamp('2010-11-26 00:00:00','yyyy-MM-dd HH24:MI:SS')
GROUP BY np.netting_profile
In above query i need to get Profile_version. but i dont want to GROUP BY profile_version.....
Multi profile_version are there so i am getting duplicate value.......
Table structure
Netting_Profile Profile_Version Effective_Date Profile_run_time_date
P1 V1 2010-11-18 00:00:00 2010-11-18 18:00:00
P1 V2 2010-11-26 00:00:00 2010-11-18 18:00:00
P1 V3 2010-11-28 00:00:00 2010-11-18 18:00:00
C1 V1 2010-11-20 00:00:00 2010-11-18 18:00:00
C2 V2 2010-11-26 00:00:00 2010-11-18 18:00:00
Expected result
Netting_Profile Profile_Version Max(Effective_Date)
P1 V2 2010-11-26 00:00:00
C1 V2 2010-11-26 00:00:00
here not able to get Profile_Version
if required what is the solution.........plz help me..........
Edited by: user1141807 on Nov 28, 2010 11:27 PM

Answer 1

SQL> SELECT deptno,max(sal)
  2  FROM emp
  3  GROUP BY deptno;
    DEPTNO   MAX(SAL)
        30       2850
        20       3000
        10       5000
SQL>
SQL> --Now I want to show ename column. Example of co-related subquery.
SQL> --Search documentation for more understanding and example.
SQL> --http://download.oracle.com/docs/cd/E11882_01/server.112/e17118/queries007.htm#i2067858
SQL> SELECT ename,deptno,sal
  2  FROM emp e1
  3  WHERE (deptno,sal) IN
  4       (SELECT deptno,max(sal)
  5        FROM emp e2
  6        WHERE e1.deptno=e2.deptno
  7        GROUP BY deptno
  8        );
ENAME          DEPTNO        SAL
BLAKE              30       2850
SCOTT              20       3000
FORD               20       3000
KING               10       5000
SQL> http://download.oracle.com/docs/cd/E11882_01/server.112/e17118/queries007.htm#i2067858
SQL> --Use Of analytical function.
SQL> SELECT ename,deptno,sal
  2  FROM (SELECT ename,deptno,sal
  3        ,RANK() OVER ( PARTITION BY deptno ORDER BY sal desc) rn
  4         FROM emp
  5         )
  6  WHERE rn<2;
ENAME          DEPTNO        SAL
KING               10       5000
SCOTT              20       3000
FORD               20       3000
BLAKE              30       2850
SQL> http://download.oracle.com/docs/cd/E11882_01/server.112/e16579/analysis.htm#i1006229