Subtotal in Oracle

Question

Hi all,
I've doubt by using cube and rollup.
here the data.
wkday colvol coldur
1 10 2
2 20 3
3 30 4
4 40 5
5 50 6
6 60 7
7 70 8
6
select wkday,colvol,coldur, null as colavg from gt_test
union
select null,null,null,(sum(colvol*coldur)/sum(colvol))colav
from gt_test
1. I'v need to get this of the by using above formula at the end of the weekday.
I got it from the above query.
logic : sum (colvol*coldur)/sum(colvol).
My question is can i do the above by using cube and rollup?
2.If I have the data for the month how to do it? currently I'm getting for the week.
Pls help me out.
Appreciated your help.
thanks & regards,
ramana.

Answer 1

<BR>
SQL> with gt_test as (
  2  select 1 wkday, 10 colvol, 2 coldur from dual
  3  union all
  4  select 2, 20, 3 from dual
  5  union all
  6  select 3, 30, 4 from dual
  7  union all
  8  select 4, 40, 5 from dual
  9  union all
10  select 5, 50, 6 from dual
11  union all
12  select 6, 60, 7 from dual
13  union all
14  select 7, 70, 8 from dual
15  )
16  select wkday, sum(colvol), sum(coldur), sum(colvol*coldur)/sum(colvol) as colavg
17  from gt_test
18  group by cube(wkday)
19  ;
     WKDAY SUM(COLVOL) SUM(COLDUR)     COLAVG
                   280          35          6
         1          10           2          2
         2          20           3          3
         3          30           4          4
         4          40           5          5
         5          50           6          6
         6          60           7          7
         7          70           8          8
8 rows selected