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Archive | December 20, 2011

Logical Data Model for Customer & Supplier

The logical data model below shows the data structure needed to support Customer, Supplier and Employee.  Pardoxically, none of these appear as an enitity on model! How can that be? There is a very good reason for this, which is that Supplier, Customer and Employee are all deriveable data entities and, as such, ought NEVER […]

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