From: | "Uwe C(dot) Schroeder" <uwe(at)oss4u(dot)com> |
---|---|
To: | Zak McGregor <zak(at)mighty(dot)co(dot)za>, Bill Moran <wmoran(at)potentialtech(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: count(1) return 0? |
Date: | 2004-03-01 01:33:11 |
Message-ID: | 200402291733.11848.uwe@oss4u.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
What is it you want ? the count of rows matching the criteria ?
If so a standard count(*) should do. If the resultset has no rows the count(*)
will return 0 as result.
On Sunday 29 February 2004 05:02 pm, Zak McGregor wrote:
> On Sun, 29 Feb 2004 19:55:15 -0500
>
> Bill Moran <wmoran(at)potentialtech(dot)com> wrote:
> > Not really sure I understand what you want, but try something like this:
> >
> > select case when count(*) > 0 then ''t'' else ''f'' end from ...
>
> Unfortunately that does not work. When the resultset contains no records
> whatsoever, I get no rows at all - so on case...else sort of expression
> within the select itself will work.
>
> What I am looking for is a way to select "0" if no rows are returned, or
> the total number of rows returned from the query otherwise.
>
> Thanks anyways though.
>
> Ciao
>
> Zak
>
> --
> ========================================================================
> http://www.carfolio.com/ Searchable database of 10 000+ car specs
> ========================================================================
>
> ---------------------------(end of broadcast)---------------------------
> TIP 5: Have you checked our extensive FAQ?
>
> http://www.postgresql.org/docs/faqs/FAQ.html
- --
UC
- --
Open Source Solutions 4U, LLC 2570 Fleetwood Drive
Phone: +1 650 872 2425 San Bruno, CA 94066
Cell: +1 650 302 2405 United States
Fax: +1 650 872 2417
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (GNU/Linux)
iD8DBQFAQpLXjqGXBvRToM4RAh1CAJ4knBgzklnG+Dmuy+62LNAU3JGqDwCcCxUY
w1VAIOauzfpO49QgK42et4c=
=/U+x
-----END PGP SIGNATURE-----
From | Date | Subject | |
---|---|---|---|
Next Message | John Wells | 2004-03-01 01:37:52 | A simple question (under pressure :-)).... |
Previous Message | Zak McGregor | 2004-03-01 01:27:39 | Re: count(1) return 0? |