Re: object algebra

From: Neo <neo55592_at_hotmail.com>
Date: 28 Feb 2004 12:21:44 -0800
Message-ID: <4b45d3ad.0402281221.431f280_at_posting.google.com>

> The above isn't a "patch for" nulls. What does "weaker relationship" mean,
> though? I have no idea how to address that one.

Given EyeColor = {red, brown, N/A} and the table: Person EyeColor
------ --------
John N/A
Mary N/A

A query to find persons with equal eyeColor returns: John & Mary. Received on Sat Feb 28 2004 - 21:21:44 CET

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