Accumulating Rolling Total on a column

Question

I need to display a list of records and I'd like to create an accumulating field based on a set of records. I need to fill in amount balances that accumulates on every record. For instance, if I have these records:
Quantity
2
3
1
5
10
My aggregated column and Quantity column would look like this:
Quantity, Rolling Total
2 , 2
3     ,     5
1     ,     6
5     ,     11
10     ,     21
How can I do that?

Answer 1

Here look at the following example script
set echo off
-- sql to create running total using analytic function
-- 20011204 Mark D Powell New, save example.
set pagesize 90
break on dname nodup
select
d.dname
,e.ename
,e.sal
,sum(e.sal)
over (partition by e.deptno
order by e.ename
rows between unbounded preceding and current row
) as Rtotal
from
emp e
,dept d
where e.deptno = d.deptno
HTH -- Mark D Powell --