From: Tom Lane <tgl@sss.pgh.pa.us>
To: Peter Galbavy <peter.galbavy@knowtion.net>
Cc: pgsql-sql@postgresql.org
Subject: Re: weighting (the results of) a query ?
Date: Tue, 07 Jan 2003 11:34:11 -0500
Message-ID: <13893.1041957251@sss.pgh.pa.us> (raw)
In-Reply-To: <023f01c2b669$6ce39270$4528a8c0@cblan.mblox.com>
References: <001301c2b4a6$f969b360$36bd10ac@walrus>
<021001c2b666$752c1d60$4528a8c0@cblan.mblox.com>
<13705.1041956070@sss.pgh.pa.us>
<023f01c2b669$6ce39270$4528a8c0@cblan.mblox.com>
"Peter Galbavy" <peter.galbavy@knowtion.net> writes:
> Not sure - what I want is only one row per real row but ordered as per the
> constants. When you say duplicate-row-elimination do you mean including the
> 'constant' weighting,
Yes, UNION would consider all columns in deciding if two rows are dups.
> What I mean is when an image row has both 'eat static' in the caption and as
> a keyword, I want it returned only once...
I think your query might fail on that requirement regardless, no? At
least I missed how you'd prevent it.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, peter.galbavy@knowtion.net
Subject: Re: weighting (the results of) a query ?
In-Reply-To: <13893.1041957251@sss.pgh.pa.us>
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