Re: Foreign Key: what value? -- currval() - Mailing list pgsql-sql

A. Kretschmer wrote:
> Davi Leal folgendes:
> > Hi,
> > How to know the value which I must set in the foreign key field?. I have
> > two tables:
> >
> >
> > CREATE TABLE AAAAAA (
> >   Id  SERIAL PRIMARY KEY,
> >   data char(9)
> > );
> >
> > CREATE TABLE BBBBBB (
> >   BBBBBB_Id integer REFERENCES AAAAAA(Id) NOT NULL,
> >   field char(5)
> > );
> >
> >
> >
> >
> > I insert a register on table AAAAAA,
> >
> >    INSERT INTO AAAAAA (data) VALUES ('123456789');
> >
> >
> > and then, I want to insert a related register in table BBBBBB, but I do
> > not know how get the proper value to the Foreign key BBBBBB_Id. Note that
> > a lot of
>
> currval() is your friend:
> 17:33 < akretschmer> ??currval
> 17:33 < pg_docbot_ads> For information about 'currval' see:
> 17:33 < pg_docbot_ads>
> http://www.postgresql.org/docs/current/static/functions-sequence.html

It works.
Thanks Andreas