how to subtract adjacent columns in an ssrs matrix

Question

I have an ssrs matrix which looks like the one below :

               Month(Columns)
            


        

Answer 1

I found a way to calculate the differences between Matrix columns using the 'previous' function by adding the column grouping name.

=Previous(Sum(Fields!AMOUNT.Value),"PeriodGroupName")

Look here for a little more detail. http://www.tricks-and-tips.nl/tips-and-tricks/sql/ssrs/ssrs-matrix-compare-column-values And here for the documentation. https://docs.microsoft.com/en-us/previous-versions/sql/sql-server-2008-r2/ms156372(v=sql.105)