Customized heading in the Group by Rollup clause

Question

I have a table with the following data.
SQL> select region, accname, secname, col1 from acc;
REGION ACCNAME SECNAME COL1
region1 acc1 sec1 40
region1 acc1 sec2 60
region1 acc1 sec3 80
region1 acc2 sec2 50
region1 acc2 sec5 70
region2 acc3 sec6 120
6 rows selected.
I get the following output for the below query.
SELECT region, accname, secname, SUM (col1)
FROM acc
GROUP BY ROLLUP (region, accname, secname);
REGION ACCNAME SECNAME SUM(COL1)
region1 acc1 sec1 40
region1 acc1 sec2 60
region1 acc1 sec3 80
region1 acc1 180
region1 acc2 sec2 50
region1 acc2 sec5 70
region1 acc2 120
region1 300
region2 acc3 sec6 120
region2 acc3 120
region2 120
420
12 rows selected.
I need customized heading like 'Security Total'/'Account Total'/'Regionwise Total' against grouped amounts. Is there anyway to get this. I am using Oracle 9i. Please help me.
Thanks.

Answer 1

We can throw in the GROUPING_ID function:
select case grouping_id(deptno, job)
when 0
then 'No Subtotalling'
when 1
then 'Job Subtotal'
when 2
then 'Department Total'
when 3
then 'Grand Total'
end
, case grouping(deptno)
when 1
then 'Department Total'
else to_char(deptno)
end Department
, case grouping(job)
when 1
then 'Job SubTotal'
else job
end Job
, sum(sal) salary_sum
from emp
group
by rollup (deptno, job)
I am not exactly sure what you are looking for. However, using GROUPING_ID you can determine what columns you are sub-totaling on (or rolling up by) in a given record.
If you are only interested in certain subtotals, you can use this query in an inline view that you further restrict.
Results:
CASEGROUPING_ID( DEPARTMENT JOB SALARY_SUM
No Subtotalling 10 CLERK 1300
No Subtotalling 10 MANAGER 2450
No Subtotalling 10 PRESIDENT 5000
Job Subtotal 10 Job SubTotal 8750
No Subtotalling 20 CLERK 1900
No Subtotalling 20 ANALYST 6000
No Subtotalling 20 MANAGER 2975
Job Subtotal 20 Job SubTotal 10875
No Subtotalling 30 CLERK 950
No Subtotalling 30 MANAGER 2850
No Subtotalling 30 SALESMAN 5600
Job Subtotal 30 Job SubTotal 9400
Grand Total Department Total Job SubTotal 29025
Lucas