Re: sub-select, view and sum()

On Monday 06 January 2003 6:31 pm, Stephan Szabo wrote:
> On Mon, 6 Jan 2003, Gary Stainburn wrote:
> > create view turn_details as
> >   select t.*, d.sid as dsid, d.sname as dname,
> >               f.sid as fsid, f.sname as fname,
> >           (select sum(r.rmiles) as rmiles from rides r where r.rtid = tid)
> >             as rmiles
> >     from turns t
> >     left outer join staff d on t.tfitter = d.sid
> >     left outer join staff f on t.tccleaner = f.sid
> >     where r.rtid = t.tid
> >     order by tdate;
> > ERROR:  Relation 'r' does not exist
>
> Do you really need the outer where r.rtid=t.tid?  I would think that the
> subselect where clause would already handle that for you.

Hi Stephan, 

Thanks for that. That was the problem.  I'd left it after trying to use a 
normal join in an earlier attempt.

Gary
-- 
Gary Stainburn
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