[firebird-support] Re: Invalid expression in the select list (not contained in either an aggregate function or the GROUP BY clause)

[sboyd...@gmail.com [firebird-support]]

 Except that grouping by OPS_ZIP would not accomplish the same thing. Multiple 
zip codes map to the same REGION_ID and the zip codes might not be contiguous.
 

 Guess I'm going to have to rethink this.