Having Percentage on the Totals line instead of SUM

Question

Hi,
I have a report with several number columns and several percentage columns. I need to show a totals line with grand totals for the number columns, and overall percentage for the percentage columns - how can I achieve this? I guess there is a more general question about showing any non-SUM summary function on the totals line, such as AVG, COUNT, MIN, MAX etc.
I could do it as a UNION I suppose but then I have the problem of formatting the totals line, and this wouldn't really work for break groups, only a grand total.
Any ideas?
Steve

Answer 1

You might want to look into the CUBE, ROLLUP and GROUPING SETS (OLAP) extensions to the GROUP BY clause in SQL. They generate intermediate subtotals, break totals, grand totals, etc using plain SQL.
Here is a quick example of what I mean
http://htmldb.oracle.com/pls/otn/f?p=24317:190
I have chosen to use SUM(SAL), AVG(COMM) and MAX(SAL) as the aggregates, you can modify this as per your requirements.
The query is
select
empno,ename,job,deptno,
sum(sal) sum_sal,
avg(comm) avg_comm,
max(sal) max_sal
from emp
group by rollup(empno,ename,job,deptno)
having  grouping_id(empno,ename,job,deptno) in (0,15)The GROUPING_ID gives a binary "bitmap" of which columns are showing a detail row vs. a aggregate/super-aggregate row. In this case, we want to show the lowest level of detail (0) and the highest grand total (15=binary 1111 or all bits turned on)
Again, you can tweak this to show intermediate subtotals, just take out that HAVING clause to see what you get and modify as needed.
Hope this helps.
Message was edited by:
Vikas