From: | Christophe Pettus <xof(at)thebuild(dot)com> |
---|---|
To: | bilal ghayyad <bilmar_gh(at)yahoo(dot)com> |
Cc: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: LIMIT 1; The Integer part only |
Date: | 2009-09-04 01:28:16 |
Message-ID: | B26ED7F3-10B2-4F36-B2F2-DC8ECB802A8A@thebuild.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-sql |
On Sep 3, 2009, at 5:49 PM, bilal ghayyad wrote:
> 1) When writing the function (I mean sql function) in the
> postgresql, I noticed the use for LIMIT 1, but did not understand
> what does it mean and why we use it?
It restricts the number of rows returned by the SELECT. You can find
the documentation here:
http://www.postgresql.org/docs/8.4/interactive/sql-select.html#SQL-LIMIT
>
> 2) Also in the function (the sql function) in the postgresql, if I
> need to take the integer part of the number, which math function can
> do this for me?
floor or trunc, depending on the behavior you want for negative numbers:
http://www.postgresql.org/docs/8.4/interactive/functions-math.html
--
-- Christophe Pettus
xof(at)thebuild(dot)com
From | Date | Subject | |
---|---|---|---|
Next Message | Simon Bateman | 2009-09-04 05:36:10 | Adding ENUM Type |
Previous Message | Steve Crawford | 2009-09-04 01:02:30 | Re: LIMIT 1; The Integer part only |