Re: Cant group by non integer - ms access - odbc

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Glenn <glenn(at)pip(dot)com(dot)au>
Cc: Ludwig Lim <lud_nowhere_man(at)yahoo(dot)com>, PostgreSQL Mailing List <pgsql-novice(at)postgresql(dot)org>
Subject: Re: Cant group by non integer - ms access - odbc
Date: 2002-12-18 16:07:14
Message-ID: 23223.1040227634@sss.pgh.pa.us
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Glenn <glenn(at)pip(dot)com(dot)au> writes:
> Seems I've actually asked the wrong q...
> My query was something like

> "SELECT f1,f2,count(f3) as countOff3, sum(f4) as countoff4,f5,"-" as f6
> FROM mytable
> GROUP BY f1,f2,f5,"-""

You never need to group by a constant, so this would work fine (and be
compliant with the standard, which your given example is not):

SELECT f1,f2,count(f3) as countOff3, sum(f4) as countoff4,f5,"-" as f6
FROM mytable
GROUP BY f1,f2,f5

> Once I took out everything to do with f6, then it worked - however I
> need f6, as this forms a select to be inserted into another table.

Depending on what's happening upstream, it might also help to explicitly
cast the "-" to some specific datatype, eg

select ..., "-"::varchar as f6 ...

regards, tom lane

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