Hi all, once again I can't wrap my head around how to approach a problem in Pig. I'm trying to count a number of elements in a timespan if they are the first that match a criterion. So let's say I have tuples with a date, a user and a purchase, and now I want to count the users that made their first purchase in the year 2010 (my timespan), but it's this "first purchase" which troubles me, because usually I'd filter by date, then aggregate purchases by users and then count the resulting rows. As it is right now I'd have to to the above and then repeat the steps for the timespan before and then subtract this set to the resulting set. Isn't there an easier way?
Regards, Chris
