Re: if exists...does it exists for insert statments? - Mailing list pgsql-general

--- On Tue, 12/11/07, Pau Marc Munoz Torres <paumarc@gmail.com> wrote:
> could i use a sentence similar to the mysql sentence
>
> insert if not exist into SP values
> ('cesp','sp');
>
> in postgresql?

Using standard ANSI-SQL the statement could be re-written:

INSERT INTO SP
     SELECT a, b
       FROM VALUES ( 'cesp', 'sp' ) AS tmp( a, b )
  LEFT JOIN Sp
         ON (Sp.col1,Sp.col2)=(tmp.a,tmp.b)
      WHERE (Sp.col1,Sp.col2) IS NULL;

Regards,
Richard Broersma Jr.