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Re: [Gnumed-devel] basic test types

From: J Busser
Subject: Re: [Gnumed-devel] basic test types
Date: Wed, 29 Sep 2004 10:52:01 -0700

At 1:29 AM -0700 9/29/04, J Busser wrote:
At 8:26 AM +0200 9/29/04, Karsten Hilbert wrote:
 > Also is it possible that a lab may keep the same code despite
 > at a later date it changes coding systems?
Sure. Perhaps not very likely, though. So we'd probably need
the constraint unique(fk_test_org, code, coding_system) right ?

And/or on the additional chance that a numeric code, which was used under an old coding system for one test, happens to be used in a new coding system for a different test, we now have the constraint unique(fk_test_org, code, coding_system) in place of unique(fk_test_org, code), right?

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