Basic HTML version of Foils prepared
7 October 97
Foil 9 Example problem description -IV
From
Untitled presentation ARL Database Tutorial --
February 98
.
by
Gang Cheng, C.W. Ou, Geoffrey C. Fox
1
Basic Assumptions in the Entity-Relationship (E-R) Model:
The pid is unique in person_info_table (can be viewed as SSN)
One person may have multiple phone numbers of the same or different type
A phone number can be shared by more than one persons
in Table To:
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