Check for all numeric in a column

From: Smith, Ron L. <rlsmith_at_kmg.com>
Date: Fri, 31 Jan 2003 08:24:46 -0800
Message-ID: <F001.005407E7.20030131082446@fatcity.com>

What is the easiest / best way to check for a valid numeric value in a column?  

R. Smith  

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Author: Smith, Ron L.
  INET: rlsmith_at_kmg.com

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