create new id to deal with multiple to multiple relationship
*UpdateSorry I should be more clear on the question. The data i currently have looks like:id email1 a1 b2 a2 c3 dWe can see that id 1 2 and email a b c are actually the same person because the info overlaps. What I'm trying to do here is to come up with a match table with a new key which i can use to match back to the original table to identify those overlap ones are actuall...