am 26.05.2006, um 9:09:25 -0700 mailte John Taylor folgendes:
> I have a select statement that goes as follows:
>
> SELECT * FROM product prod, prod_alias pa, category cat, company co
> WHERE prod.catid = cat.catid
> AND prod.coid = co.coid
> AND prod.prodid = pa.prodid;
>
> If possible, I want to change the statement so that I get output
> regardless of whether there's a match between prod.prodid and
> pa.prodid. IOW, if there's a match between prod.prodid and pa.prodid,
> I want the output from both the product table and the prod_alias
> table. if there's no match, I still want the output from product
> table. Can I do this in one select statement?
I think, you should read about 'left outer join'.
http://www.postgresql.org/docs/8.1/interactive/queries-table-expressions.html#QUERIES-FROM
HTH, Andreas
--
Andreas Kretschmer (Kontakt: siehe Header)
Heynitz: 035242/47215, D1: 0160/7141639
GnuPG-ID 0x3FFF606C http://wwwkeys.de.pgp.net
=== Schollglas Unternehmensgruppe ===