3 Replies Latest reply: Nov 20, 2013 1:52 PM by Stefan Wühl RSS

    calculating how many customers have purchased this product at least twice

    David Vasseur

      Hi,

       

      For some market analysis I'd like to calculate, per product, how many customers have purchased this product at least twice.

       

      My formula is working if there is only one product selected but not otherwise, see attached sample.

       

      I have hundreds millions of rows so an optimised expression is required ;-)

       

      Regards,

      David