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From: Scott Marlowe <smarlowe@g2switchworks.com>
To: KeithW@narrowpathinc.com
Cc: PostgreSQL SQL <pgsql-sql@postgresql.org>
Subject: Re: More efficient OR
Date: Wed, 16 Feb 2005 10:15:15 -0600
Message-ID: <1108570515.11967.223.camel@state.g2switchworks.com> (raw)
In-Reply-To: <20050216155901.M41773@narrowpathinc.com>
References: <20050216155901.M41773@narrowpathinc.com>

On Wed, 2005-02-16 at 10:02, Keith Worthington wrote:
> Hi All,
> 
> In several of my SQL statements I have to use a WHERE clause that contains
> mutiple ORs.  i.e.
> 
> WHERE column1 = 'A' OR
>       column1 = 'B' OR
>       column1 = 'C'
> 
> Is there a more efficient SQL statement that accomplishes the same limiting
> functionality?

The in() construct is (nowadays) basically the same as ORing multiple
columns;

where column1 in ('A','B','C')



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