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I have a pivot table containing 1 expression which contains a number of transactions.
Now I want to create a second expression (last) which contains a percentage with the difference between the current number of transactions with the previous number of transactions
e.g. the number of transactions of year 2011 - 2010 / 2010 - 2009 / 2009 - 2008
I did try some stuff with the function Last() but this needs a fixed offset ... is there a way of using this function and take the previous value??
thx in advance!!