jenhil34 jenhil34 - 7 months ago 8
SQL Question

SQL Query SUM for each date from first date

I have searched all over and this is driving me crazy. Let's say I have two fields: actiondate and qty. Here is a sample of the data:

actiondate qty
4/22/2016 2
4/23/2016 7
4/23/2016 4
4/25/2016 9
4/26/2016 6
4/26/2016 3
4/26/2016 4


I want to group on the action date, and sum the qty from the beginning date, like this:

actiondate qty
4/22/2016 2
4/23/2016 13
4/25/2016 22
4/26/2016 35


I sincerely appreciate anyone's help on this.

Answer

here is quick version:

select actiondate, (
    select sum(qty)
    from table t2
    where t2.actiondate <= t1.actiondate) as qty
from table t1
group by actiondate
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