Data Display Query

Question

Hello, I have a question. I have data in my DSO like this:
Customer      Calmonth      ZCalmonth      Quantity
101               201411            201406            10
101               201410            201406            20
101               201407            201406            30
101               201406            201406            8
101               201404            201406            9
102               201411            201409            10
102               201410            201409            12
102               201409            201409            20
102               201407            201409            6
102               201406            201409            9
102               201404            201409            10
My requirement is to add up the quantity based off of the value in ZCALMONTH, so for example: for customer 101, i want to show a record from beginning till 2014006 period which should be like this:
Customer Quantity
101             17 which is a made of 8+9
102             45 which is a made of 20+6+9+10
How can i do this at the query level please? Back-end can also be an option if this is not do able at query level.
Thanks.

Answer 1

Phani, this will be easier if i had 0calmonth and zcalmonth in my query but i don't want to break down like that. i only want to display the aggregated result. as you may see that i only have
0customer and quantity
in my query output, which is user requirement because user doesnot want to see the break down of each month but they only want to see all the months quatities aggregates into one record until what is specified in ZCALMONTH and the only way to gather it by aggregating it.
thanks.