RES: Left join?

It´s just want I need! Perfect! Thanks!

Carlos

> -----Mensagem original-----
> De: Richard Broersma Jr [mailto:rabroersma(at)yahoo(dot)com]
> Enviada em: sábado, 1 de julho de 2006 18:45
> Para: carlosreimer(at)terra(dot)com(dot)br; pgsql-sql(at)postgresql(dot)org
> Assunto: Re: [SQL] Left join?
>
>
> > In the following table, codsol, codate and codfec are foreign keys
> > referencing table func and I need some help to codify a SELECT
> command that
> > produces the following result set but instead of codsol, codate
> and codfec I
> > need the respectives names (column nome from table func).
> >
> > postgres=# select * from reqtran;
> > codreq | codsol | codate | codfec
> > --------+--------+--------+--------
> > 1 | | |
> > 2 | 1 | |
> > 3 | 1 | 1 |
> > 4 | 1 | 1 | 1
> > postgres=# \d func
>
> > Table "public.func"
> > Column | Type | Modifiers
> > --------+---------+-----------
> > codfun | integer | not null
> > nome | text |
>
> > Indexes:
> > "reqtran_codate_fkey" FOREIGN KEY (codate) REFERENCES func(codfun)
> > "reqtran_codfec_fkey" FOREIGN KEY (codfec) REFERENCES func(codfun)
> > "reqtran_codsol_fkey" FOREIGN KEY (codsol) REFERENCES func(codfun)
>
> Would this do what you need?
>
> select R1.codreq,
> CS.nome,
> CD.nome,
> CF.nome
> from rectran as R1
> left join func as CS on (R1.codsol=CS.codefun)
> left join func as CD on (R1.codate=CD.codefun)
> left join func as CF on (R1.codfec=CF.codefun)
> ;
>
> Regards,
>
> Richard Broersma Jr.
>