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Chapter 4: The Enhanced ER Model and Business Rules

Chapter 4: The Enhanced ER Model and Business Rules

Chapter 4: The Enhanced ER Model and Business Rules. Supertypes and Subtypes. Subtype: A subgrouping of the entities in an entity type that has attributes distinct from those in other subgroupings Supertype: A generic entity type that has a relationship with one or more subtypes

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476 views • 35 slides
Chapter 4: The Enhanced ER Model and Business Rules

Chapter 4: The Enhanced ER Model and Business Rules

Chapter 4: The Enhanced ER Model and Business Rules. Modern Database Management 7 th Edition Jeffrey A. Hoffer, Mary B. Prescott, Fred R. McFadden. Objectives. Definition of terms Use of supertype/subtype relationships Use of generalization and specialization techniques

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345 views • 33 slides
Chapter 4: The Enhanced ER Model and Business Rules

Chapter 4: The Enhanced ER Model and Business Rules

Chapter 4: The Enhanced ER Model and Business Rules. Supertypes and Subtypes. Subtype: A subgrouping of the entities in an entity type that has attributes distinct from those in other subgroupings Supertype: A generic entity type that has a relationship with one or more subtypes

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426 views • 28 slides
The Enhanced Entity Relationship Diagrams (E-ERDs)

The Enhanced Entity Relationship Diagrams (E-ERDs)

The Enhanced Entity Relationship Diagrams (E-ERDs). Supertypes and Subtypes. Subtype: A subgrouping of the entities in an entity type that has attributes distinct from those in other subgroupings Supertype: A generic entity type that has a relationship with one or more subtypes

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432 views • 22 slides

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