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The top documents tagged [er attributes]
Entity Relationship Model
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Chapter 5 1 © Prentice Hall, 2002 Chapter 5: Transforming EER Diagrams into Relations Mapping Regular Entities to Relations 1. Simple attributes: E-R attributes
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Logical Database Design and the Relational Model
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Chapter 4: Logical Database Design and the Relational Model
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Keys are special fields that serve two main purposes: ◦ Primary keys are unique identifiers of the relation in question. Examples include employee numbers,
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