Example: bankruptcy
The Extended Entity Chapter 5 Relationship Model

The Extended Entity Chapter 5 Relationship Model

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• As identifier of Composite Entity Enroll CS275 Fall 201021 Use of Composite Primary Keys • As identifier of a Weak Entity • Dependent entity exists only when it is related to parent entity 22 Use of Surrogate Primary Keys • Especially helpful when there is: 1. No natural key 2. Selected candidate key has embedded semantic contents 3.

  Entity, Identifiers

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