Markus Schaber <[EMAIL PROTECTED]> writes: > I just stumbled over a slightly confused error message:
> mydb=# select count(*),coverage_area from myschema.streets except select > cd as coverage_area from countryref.disks group by streets.coverage_area; > ERROR: column "streets.coverage_area" must appear in the GROUP BY > clause or be used in an aggregate function > As the query looks, streets.coverage_area is actually used in the GROUP BY. The complaint is 100% accurate; the subquery that it's unhappy about is select count(*),coverage_area from myschema.streets which is an aggregating query, but coverage_area is being used outside an aggregate without having been grouped by. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly