I have two files and I'd like to join and make a group-by on a xycod, in order to count the number of occurrences. This is the question: What happens on the RRN filed when i try to do group by statement? There is one-to-many relation between records and RRNs, so which is the RRN assigned to it?
October 13, 2008 1:27 PM
August 22, 2010 10:05 PM