The key word here is "could". It's MUCH easier to just use a PK.
>yea yea yea
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>Craig is correct, if you are going to use more then one table you are asking for trouble, and if you update the source at the correct times and validate when/if you re-write to the source table you could make it fool-proof
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Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer