From: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
---|---|
To: | Antoine <melser(dot)anton(at)gmail(dot)com> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: OT - select + must have from - sql standard syntax? |
Date: | 2006-06-13 21:02:47 |
Message-ID: | 20060613210246.GA34196@pervasive.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-performance |
On Tue, Jun 13, 2006 at 02:43:45PM +0200, Antoine wrote:
> Hi,
> I don't have a copy of the standard on hand and a collegue is claiming
> that there must be a from clause in a select query (he is an oracle
> guy). This doesn't seem to be the case for postgres... does anyone
> know?
Dunno, but I know that other databases (at least DB2) don't require FROM
either. In Oracle, if you want to do something like
SELECT now();
you actually have to do
SELECT now() FROM dual;
where dual is a special, hard-coded table in Oracle that has only one
row. Personally, I find their approach to be pretty stupid.
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
From | Date | Subject | |
---|---|---|---|
Next Message | Tom Lane | 2006-06-13 21:07:24 | Re: Confirmation of bad query plan generated by 7.4 tree |
Previous Message | Shaun Thomas | 2006-06-13 20:54:44 | Re: Confirmation of bad query plan generated by 7.4 |