Running Sums???

Question

Say I've got a simple table:
Table
: Fields: Key, Section
given the statement:
select Section, Count(Key)
from Table
group by Section;
you will get the count of keys per section.
But what if I not Only want the Count of Keys per section, but also a sum of two sections at a time.
Like:
select Section, Count(Key), Sum(Section 1 & 2)
from table
group by section;
now i know that is not accurate, but i think my idea is clear enough. In ACCESS ( i hate to mention the evil-one) it was called a cross-tab query, when you could do multiple aggregates and running summations, but i don't know how to do that in oracle sql (or even if it can be done)
the output for this query (as i see it) should be
section 1 Count
Section 2 Count
Section 1+2 Count
Section 3 Count
Section 1+2+3 Count
section 4 count
section 1+2+3+4 Count
etcetera
(i'll understand if it can't be done, but I would think it could be)
Thanks
Jaeden "Sifo Dyas" al'Raec ruiner

Answer 1

Just for fun #2 :))
SQL> select new_d deptno, sc
  2    from (select t.*,
  3                 lev,
  4                 decode(lev,1, to_char(d), ltrim(sys_connect_by_path(d, '+'), '+')) new_d,
  5                 decode(lev, 1, cnt, sumc) sc
  6            from (select e.deptno d,
  7                         count(1) cnt,
  8                         sum(count(1)) over(order by e.deptno) sumc,
  9                         row_number() over(order by e.deptno) rn
10                    from scott.dept d, scott.emp e
11                   where e.deptno = d.deptno
12                   group by e.deptno) t,
13                 (select 1 lev  from dual  union all select 2 from dual)
14          connect by prior rn = rn - 1
15                 and prior lev = lev
16           start with rn = 1
17           order by d, lev
18          ) t
19   where rn = lev
20      or rn > 1
21  /
DEPTNO             SC
10                  3
20                  5
10+20               8
30                  6
10+20+30           14