Date: Thu, 14 Mar 2013 23:58:11 +0000
From: Ben Morrow <ben@morrow.me.uk>
To: jorgemal1960@gmail.com, pgsql-sql@postgresql.org
Subject: Re: UPDATE query with variable number of OR conditions in WHERE
Message-ID: <20130314235807.GA81164@anubis.morrow.me.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: 
 <CAAY=A7-JA3iaitwjh+kYAsq0frUqBGkauwYVSSWBqz-feDAO7Q@mail.gmail.com>
Organization: morrow.me.uk
User-Agent: Mutt/1.5.21 (2010-09-15)
Precedence: bulk
Sender: pgsql-sql-owner@postgresql.org

Quoth jorgemal1960@gmail.com (JORGE MALDONADO):
> 
> I am building an UPDATE query at run-time and one of the fields I want to
> include in the WHERE condition may repeat several times, I do not know how
> many.
> 
> UPDATE table1
> SET field1 = "some value"
> WHERE (field2 = value_1 OR field2 = value_2 OR .....OR field2 = value_n)
> 
> I build such a query using a programming language and, after that, I
> execute it. Is this a good approach to build such a query?

You can use IN for this:

    UPDATE table1
    SET field1 = "some value"
    WHERE field2 IN (value_1, value_2, ...);

Ben


-- 
Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-sql