How to calculate a column bases on the result of another column?

Question

Hello folks, i need some help with this senario.
I don't know to explain this in a simple way, but i'll give it a go.
I display a report in ApplicationExpress like this
Each row displays a product where the user are going to make a forecast for 18 months ahead.
[productname] [Stock] [sales] [PMonth] [NewstockMonth] [salesmonth1]      [ProductionMonth1]     [NewstockMonth1] ....
[product1]______[10]____[5]____[0]_________[5]__________[10]_________[10]______________[5]
[product2]______[2 ]____[0]____[0]_________[2]__________[5]__________[10]______________[ 7]
[product3]______[30]____[20]___[0]_________[10]_________[5]_________[10]______________[15]
Stock and sales are results of a function i have in my select.
productionmonth is a text field where the user can edit the production and is saved in the table.
So when the user has entered some inputs in the textboxes, and pressed the submit buttom, the newstockmonth columns
should be calculated from the result i get from the previous month.
newstockmonth = (stock-sales)+productionMonth
newstockmonth1 =(newstockmonth-salesmonth1)+productionmonth1
At this point my submit process has update in a for loop for each row. But i don't quite know how i can calculate every newstockmonth columns.

Answer 1

Hi Klaus,
your condition only works if the Shop is in the query. If I understood it correctly you have one query with
Country   Shop   Total Sales
and one with
Country   Number of Shops   Total Sales
and you don't want to restrict the second Total Sales but the Total Sales from the first query.
Best regards
   Dirk