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Problems with computed fields

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Hi i got a DW that retrieves data from orders-orders details table.

DW works in this way:

 

Detail band: nothings is showed but retrieve all details from orders= product, units, price

- In this band i got a computed field (units_nogifts) that says: If (price > 0, units, 0) >> this is because we just want to know how many units of products that they are not gifts.

 

Group 2 - group by master order = client, order code, total prize, shipping, etc..

- In the header of this group i got 3 computed fields:

(double_order) ; If (sum (units_nogifts for group 2) = 2, 1, 0)

(triple_order) ; If (sum (units_nogifts for group 2) = 3, 1, 0)

(bigger_order) ; If (sum (units_nogifts for group 2) = 4, 1, 0)

 

-Group 1 - group by Payment Methods (credit card - bank transfer....)

- In the trailer of this band i got 3 computed fields:

Sum(double_order for group 1) -> just for kwowing how many double order threre are for each payment method
Sum(triple_order for group 1)
Sum(

bigger_order for group 1)

 

- In summary i got 3 computed field:

Sum(double_order for group all) -> just for kwowing total of double orders threre are
Sum(triple_order for group all)
Sum(

bigger_order for group all)

 

Problem is that computed fields that sum(double_order).....in trailer of group 1 and summry dont calculate rigth values.

In fact i dont know whats the final sum that show.

Id like to know if i can do that in the way, maybe it's not possible make sum from computed fields placed in group headers.

Any advice?

 

thanks in advance


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