Re: Novice SQL Question

To answer my own question:

I discoverd that the order by fields had to be in the select list. Apparently,
this is a requirement when using "DISTINCT".

On Monday 02 February 2004 05:38 pm, Terry Lee Tucker wrote:
> I need to the following query:
> select distinct event_code, level from logs join stat on (stat.prime is not
> null) where order_num = 130680;
>
> Ok, no problem. Does exactly what I want; however, I need to sort this is a
> particular way to get the right results. When I try to add the order by
> clause, I get an error. Here is the ORDER BY:
> ORDER BY event_date DESC, event_time DESC, event_secs DESC
>
> If I put this where I thought it should go as in:
> select distinct event_code,level from logs join stat on (stat.prime is not
> null) where order_num = 130680 order by event_date,event_time,event_secs;
>
> I get the following error:
> ERROR:  For SELECT DISTINCT, ORDER BY expressions must appear in target
> list
>
> No matter where I put it I get errors. Obviously, I'm a novice. Can
> somebody give me any advice? I'm using Postgres 7.2.3 on RedHat.
>
> Thanks...

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