Covariance Function in Postgresql??

From: jonathan(dot)nichols(at)sbcglobal(dot)net (Jonathan Nichols)
To: pgsql-general(at)postgresql(dot)org
Subject: Covariance Function in Postgresql??
Date: 2003-04-08 18:19:00
Message-ID: b6369b07.0304081019.6a98eebb@posting.google.com
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Hello,

I'm looking to take the covariance of two columns in a postgresql
table. I know there are sum, average, variance and standard deviation
functions. Is there a covariance function hiding somewhere?

thanks,

jon

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