From: stevedtrm <>
Date: Wed, 26 Dec 2007 09:10:13 -0800 (PST)
Message-ID: <>

What are NULLs for?

Missing information? Then surely there should just be no tuple?

To indicate that there can be no value? Why not a seperate table with a boolean value in the non-key column?

Steve B. Received on Wed Dec 26 2007 - 18:10:13 CET

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