Thread

Re: [BUGS] Bug with a join and group by query.

Bruce Momjian <maillist@candle.pha.pa.us> — 1999-02-22T02:42:06Z

> Hi.
> I think I found a bug. My query works in mysql.
> I have 2 tables. It's for a classifieds database. 1 is the categories, and
> the second is the postings. Postings are categorised and related to a
> category. I'll dump the contents of the tables and append it to the
> message if anyone wants test data.
> 
> postgres 6.4 does:
> select cl_categories.catid,cl_categories.description,count(*) from
> cl_categories,cl_postings where catid=categoryid group by catid;
> ERROR:  parser: illegal use of aggregates or non-group column in target
> list

You must group by all non-aggregate fields. That includes description.



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