Adler, Eliedaat <ead...@nds.com> wrote:
> I have a table with many columns describing objects on a disk.
>
> filename, date, owner, size
> A 12 MO 100
> B 13 JAK 90
> C 10 MO 80
> A 13 LU 70
>
> I have many different ways of ordering these objects. Usually using
> several sort parameters.
>
> I need a running sum of size that works regardless of what order the
> objects are in.
>
> Sort by date,owner
> Name Size Sum
> C 80 80
> A 100 180
> B 90 270
> A 70 340
You'll be better off calculating the running total in the host
application, as you step over the resultset. But, if you insist:
select filename, size,
(select sum(t2.size) from mytable t2
where t2.date <= t1.date and (t2.date < t1.date or t2.owner <
t1.owner) Sum
from mytable t1
order by date, owner;
Igor Tandetnik
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