Pivot table subtraction row

Question

Hi there,
Is it possible to subtract the values of two rows in a pivot table and show as the third row if we can assure that there will always be only two rows in the pivot table?
Pivot table view:
h2. Year  M01   M02   M03    Q01 Total_
*2009*    493    437    529    *1459*
*2010*    599    579    643    *1,821*
Problem: I am trying to generate another row in the bottom (In the place of Grand Total) and show the result of M01-M02.
Underlying data columns:
Year, Month, Quarter, #Orders
Underlying Filter: (this assures 2 years)
Year IN "Previous Year", "Current Year"
Version: OBIEE 10
thanks!
Edited by: obitime on Dec 28, 2011 9:45 PM

Answer 1

Instead of using a pivot table that way, create seperate measures using the filter function:
current year amt = filter(measure using year=[current year])
previous year amt = filter(measure using year=[current year] - 1)
change amt = filter(measure using year=[current year]) - filter(measure using year=[current year] - 1)
You may want to define [current year] using a prompt which sets a variable.
A second option is to write a formula like case when year = [current year] then 'Current Year' else 'Previous Year' end, and use that in your pivot table in place of Year. That way you can create your calculated item formula on something more dynamic.
Regards,
Robert