Question

I am trying to calculate a SUM in an MS Access report the following way:

• Group1header – label

  • Group2header – value
    • Detail – example
    • Detail – example
  • Group2header – value
    • Detail – example

• Group1footer [sum of Group2header value]

Somehow, when more detail rows appear, the sum in group1footer is incorrectly calculated (adds value for each detail).

I can not calculate the sums in the query, because the ‘value’ is already a calculated in the query (a subquery would return to many rows):

(     (         (sl_ticketdetail.weight,0) * sl_ticketdetail.amount          - (             SELECT SUM(sl_invoicedetail.amount)             FROM sl_invoicedetail              WHERE ticketdetailid = sl_ticketdetail.ticketdetailid         )         / 1000     )     * sl_ticketdetail.cost ) / 1000 

Any idea on what could be going wrong?

Answer 1

Since you already have the Group2 sums pre-calculated in your query they will be repeated for each row of results and therefore cannot be used (as you found out) to calculate the Group 1 totals.

You have two solutions

1) pre-calculate the Group1 totals in your query as well and simply report them liek you do the Group2 totals

2) use code in the Group2 footer format/print events to capture the value and manually increment a running Group1 total

I would say 1) is the easiest – 2) is a little hairy and sometimes results in inaccurate totals if the users pages back and forth