Re: Concat field result in select query

Also, the array_accum aggregate isn't present by default, you need to
create it with :

CREATE AGGREGATE array_accum (anyelement)
(
sfunc = array_append,
stype = anyarray,
initcond = '{}'
);

On Fri, 2008-08-22 at 18:24 +0200, Julien Cigar wrote:
> of course: http://rafb.net/p/EOaYfO59.html
>
> Julien
>
> On Fri, 2008-08-22 at 15:58 +0200, Nacef LABIDI wrote:
> > any explanations ?
> >
> > On Fri, Aug 22, 2008 at 6:07 PM, Julien Cigar <jcigar(at)ulb(dot)ac(dot)be>
> > wrote:
> > array_accum ?
> >
> >
> > On Fri, 2008-08-22 at 15:40 +0200, Nacef LABIDI wrote:
> > > Hi all,
> > >
> > > I was wondering if there is a way to concatenate the results
> > of a
> > > field in a select to return it as a single string.
> > >
> > > Example :
> > >
> > > my_field
> > > --------------
> > > 1
> > > 2
> > > 3
> > >
> > > select concat_something(my_field) from my_table group by
> > something;
> > > the result expected would be someting like that : 1/2/3
> > (with a
> > > separator it would be really nice)
> > >
> > > I hope that I am not asking for too much ;)
> > >
> > > Thanks to all
> > >
> >
> > --
> > Julien Cigar
> > Belgian Biodiversity Platform
> > http://www.biodiversity.be
> > Université Libre de Bruxelles (ULB)
> > Campus de la Plaine CP 257
> > Bâtiment NO, Bureau 4 N4 115C (Niveau 4)
> > Boulevard du Triomphe, entrée ULB 2
> > B-1050 Bruxelles
> > Mail: jcigar(at)ulb(dot)ac(dot)be
> > @biobel: http://biobel.biodiversity.be/person/show/471
> > Tel : 02 650 57 52
> >
> >
> >
--
Julien Cigar
Belgian Biodiversity Platform
http://www.biodiversity.be
Université Libre de Bruxelles (ULB)
Campus de la Plaine CP 257
Bâtiment NO, Bureau 4 N4 115C (Niveau 4)
Boulevard du Triomphe, entrée ULB 2
B-1050 Bruxelles
Mail: jcigar(at)ulb(dot)ac(dot)be
@biobel: http://biobel.biodiversity.be/person/show/471
Tel : 02 650 57 52