Week 2.1 (Friday)

Week 2.1 (Friday) - 7/17/2009 1 SIT103 SIT103 Introduction...

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Unformatted text preview: 7/17/2009 1 SIT103 SIT103 Introduction to Introduction to Database Design Database Design Database Design Database Design Data Models - The foundation to good database design Week 2 lecture 2 Development of data models Development of data models 2 T2-2009 Models and abstractions Models and abstractions y Abstraction is a way of classifying data models Designing usable databases follow the same rules Many ways to classify data models y Why do we want to know this? 3 T2-2009 7/17/2009 2 Levels of data abstraction Levels of data abstraction 4 T2-2009 Conceptual model Conceptual model y Gives a global view of the DB y Enterprise wide, high level representation for managers Conceptual models avoid representing unnecessary detail Only main objects represented y Entity-relationship is the most commonly used model 5 T2-2009 Conceptual model: an example Conceptual model: an example 6 T2-2009 7/17/2009 3 Advantages of conceptual models Advantages of conceptual models y Easy to understand...
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This note was uploaded on 09/27/2009 for the course SEB 323 - S taught by Professor Professor during the Three '09 term at Deakin.

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Week 2.1 (Friday) - 7/17/2009 1 SIT103 SIT103 Introduction...

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