Re: codd's 12 Rules -- MIDRANGE-L

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Subject: Re: codd's 12 Rules
From: CRPence <CRPbottle@xxxxxxxxx>
Date: Sat, 18 May 2013 11:15:11 -0700
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On 17 May 2013 11:43, Charles Wilt wrote:

I seem to recall hearing that no current RDBMS meets all of Codd's
rules..

http://www.cse.ohio-state.edu/~sgomori/570/coddsrules.html

"Note that based on these rules there is no fully relational database
management system available today. In particular, rules 6, 9, 10, 11
and 12 are difficult to satisfy."

Undated, /dated/ material? Seems from the given link, for lack of any other apparent implication provided, that "today" represents the year 1994.

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