From: Tom Lane <tgl@sss.pgh.pa.us>
To: Mark Fenbers <Mark.Fenbers@noaa.gov>
Cc: PostgreSQL - SQL <pgsql-sql@postgresql.org>
Subject: Re: Just 1 in a series...
Date: Fri, 02 Dec 2005 12:20:30 -0500
Message-ID: <3720.1133544030@sss.pgh.pa.us> (raw)
In-Reply-To: <43908131.9060403@noaa.gov>
References: <43908131.9060403@noaa.gov>
Mark Fenbers <Mark.Fenbers@noaa.gov> writes:
> ... However, I only want the first occurrence of a such a series (where the
> event_id is the same), what SQL syntax should I use to do this?
You might find the "DISTINCT ON" syntax does just what you want --- see
the "weather report" example on the SELECT reference page. It's not
standard SQL though.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, Mark.Fenbers@noaa.gov
Subject: Re: Just 1 in a series...
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