Re: Generalised approach to storing address details
From: Neo <neo55592_at_hotmail.com>
Date: 10 Dec 2006 09:59:13 -0800
Message-ID: <1165773553.574614.48780_at_l12g2000cwl.googlegroups.com>
Date: 10 Dec 2006 09:59:13 -0800
Message-ID: <1165773553.574614.48780_at_l12g2000cwl.googlegroups.com>
> Information Principle implies that all kind of entities represented in
> the database are relvars and nothing but relvars....relvar require 2VL...
So according to your understanding, are the following tables complying with IP? Or are they breaking the cardinality relationship between predicates and relations.
T_Hierarchy
Parent Child
john jim
T _Person
Name Age Weight
john 28 yr 180 lbs
And how would you store the infomation that "john likes mary" while complying with IP and still be able to retrieve 1) who likes mary 2) what does john like 3) john does what to mary. Received on Sun Dec 10 2006 - 18:59:13 CET