I'm using the In-Database nodes to achieve the same effect as the following SQL statement:
SELECT *,
SUM("NET_QTY") OVER (PARTITION BY A."MATNR" ORDER BY "MJAHR","BUDATMKPF") AS "BALANCE"
FROM A
The creates an output where an additional column is added to the output called Balance. The balance is running total of NET_QTY for a particular product/material ordered by a date "BUDATMKPF".
