Thanks, Barry... I've never heard of anyone else calling such aggregations a "Tally Table", but I certainly can see where the term both applies and is convenient.
Just to throw another name into the mix, I've heard some people call what I'm calling a "Tally" table, an "Index" table, which also seems appropriate considering its use. They even used the letter "i" for the column name instead of "N".
--Jeff Moden
Change is inevitable... Change for the better is not.