'Superclass subclass' diaporamas de présentation

Chapter 4

Chapter 4. Enhanced Entity-Relationship and UML Modeling. Subclasses, Superclasses, and Inheritance (1/3). In many cases an entity type has numerous subgroupings of its entities that are meaningful and need to be represented explicitly because of their significance to the database application.

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Introduction to Topic Maps (2) Understanding the details

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Enhanced Entity-Relationship and UML Modeling

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Chapter 8 The Enhanced Entity-Relationship (EER) Model

Chapter 8 The Enhanced Entity-Relationship (EER) Model. The Enhanced Entity-Relationship (EER) Model. Enhanced ER (EER) model Created to design more accurate database schemas Reflect the data properties and constraints more precisely More complex requirements than traditional applications.

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Enhanced Entity-Relationship (EER) Model

Enhanced Entity-Relationship (EER) Model. Enhanced-ER (EER) Model Concepts. Includes all modeling concepts of basic ER Additional concepts: subclasses/super classes, specialization/generalization, categories, attribute inheritance

1.89k views • 23 slides

Enhanced Entity-Relationship and UML Modeling

Enhanced Entity-Relationship and UML Modeling. Enhanced-ER (EER) Model Concepts. Includes all modeling concepts of basic ER Additional concepts: subclasses/superclasses, specialization/generalization, categories, attribute inheritance

466 views • 21 slides

Object-Oriented Programming in Java

Object-Oriented Programming in Java. Object-Oriented Programming Outline. Introduction Superclass & subclass protected members Relationship between superclass objects & subclass objects Constructors & Finalizers in subclasses Composition versus Inheritance.

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ER/EER to Relational Mapping Chapter 7.1-7.2

ER/EER to Relational Mapping Chapter 7.1-7.2 STEP 1 ENTITY TYPE E (non weak) -> NEW RELATION T RELATION T: includes all simple attributes (non composite, single-valued) from E includes only simple component attributes of a composite attribute from E (they are on their own now)

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