GROUPING SETS

When i work on Dashboard features. I facing problem to calculate by grouping set. Before this i using analytic function OVER PARTITION BY but i think oracle sure got better solution for my prob then i found this great discussion related to what im looking for. For people who are seeking about doing report got much idea there. this is the link:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:3230380179748#50647928008459
Act, they are discussing about ROLLUP AND CUBE.

Lastly i found solution related to my work. Thank GOD. Which is a bit same like below example.

SAMPLE
SQL> select * from mytable;

     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
      7369 SMITH      CLERK           7902 17-DEC-80        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
      7521 WARD       SALESMAN        7698 22-FEB-81       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-81       2975                    20
      7654 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-81       2850                    30
      7782 CLARK      MANAGER         7839 09-JUN-81       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-87       3000                    20
      7839 KING       PRESIDENT            17-NOV-81       5000                    10
      7844 TURNER     SALESMAN        7698 08-SEP-81       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-87       1100                    20

     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
      7900 JAMES      CLERK           7698 03-DEC-81        950                    30
      7902 FORD       ANALYST         7566 03-DEC-81       3000                    20
      7934 MILLER     CLERK           7782 23-JAN-82       1300                    10
 

QUERY
select count( case when deptno = 10 and job = 'CLERK' then 1 end ) cat1,
  2         count( case when deptno = 20 and job = 'ANALYST' then 1 end ) cat2,
  3         count( case when deptno = 30 and job = 'PRESIDENT' then 1 end ) cat3,
  4         count( case when deptno = 40 and job = 'CLERK' then 1 end ) cat4,
  5         count( case when deptno = 20 and job = 'MANAGER' then 1 end ) cat5,
  6         count( case when deptno = 10 and job = 'SALESMAN' then 1 end ) cat6
  7    from mytable
  8   where hiredate < trunc(sysdate+1)
  9  /
 

RESULT

CAT1       CAT2       CAT3       CAT4       CAT5       CAT6
---------- ---------- ---------- ---------- ---------- ----------
         1          2          0          0          1          0

in my case. i just change count to sum to get the total of the condition i want. Then using some programming language to populate the SUM(CASE WHEN AND THEN END). About performance, so far ok.


THANKS TO ASKTOM FOR THIS IDEA :)

ITS TAKES ME ABOUT A WEEK TO FIGURE IT OUT.

IM NEWBIE IN DATABASE :p