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Entity relationship model continued - PowerPoint PPT Presentation

Chapter 2

Chapter 2

Chapter 2. Data Models Database Systems: Design, Implementation, and Management, Seventh Edition, Rob and Coronel. In this chapter, you will learn:. Why data models are important About the basic data-modeling building blocks What business rules are and how they influence database design

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655 views • 58 slides
Data Models

Data Models

Data Models. Objectives. Why data models are important About the basic data-modeling building blocks What business rules are and how they influence database design How the major data models evolved How data models can be classified by level of abstraction. The Importance of Data Models.

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691 views • 57 slides
Chapter 2

Chapter 2

Chapter 2. Data Models Database Systems: Design, Implementation, and Management, Seventh Edition, Rob and Coronel. The Importance of Data Models. Data models Relatively simple representations, usually graphical, of complex real-world data structures

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650 views • 50 slides
Chapter 2

Chapter 2

Chapter 2. Data Models Database Systems: Design, Implementation, and Management, Seventh Edition, Rob and Coronel. In this chapter, you will learn:. Why data models are important About the basic data-modeling building blocks What business rules are and how they influence database design

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873 views • 47 slides
Database Modeling Using the Entity-Relationship Model (Continued)

Database Modeling Using the Entity-Relationship Model (Continued)

Database Modeling Using the Entity-Relationship Model (Continued). Usage of Weak Entities. Weak Entity can be used when converting a n-ary relationship to a number of binary relationships. The basic algorithm can be found in the previous lecture note.

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342 views • 23 slides

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