Re: Update Join Query - Mailing list pgsql-general

De: Daniel Futerman <daniel.futerman@gmail.com>
Asunto: [GENERAL] Update Join Query
A: pgsql-general@postgresql.org
Fecha: lunes, 23 junio, 2008, 4:43 pm

Hi,

Looking for the correct syntax for an UPDATE LEFT JOIN query in PostgreSQL.

The equivalent MySQL query is :

    UPDATE
        Foo f LEFT JOIN Goo g on f.Foo_ID = g.Goo_ID
    SET
        f.Foo_ID = g.Goo_ID
    WHERE
        f.Foo_ID IS NOT NULL;


 When I try to run this in Postgres, i get the following error:

ERROR:  syntax error at or near "LEFT"

Is it possible to have UPDATE JOIN queries in PostgreSQL?

Thanks.


Try this..

UPDATE Foo f
    SET f.Foo_ID = g.Goo_ID
FROM (
    select g.Goo_ID from Goo g
    RIGHT JOIN Foo f on (f.Foo_ID = g.Goo_ID)
    WHERE f.Foo_ID IS NOT NULL;
    ) g