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Chapter 4

Chapter 4

Chapter 4. Notes. Entity-Relationship Model. E/R Diagrams Weak Entity Sets Converting E/R Diagrams to Relations. Purpose of E/R Model. The E/R model allows us to sketch database schema designs. Includes some constraints, but not operations.

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735 views • 61 slides
Entity-Relationship Model

Entity-Relationship Model

Entity-Relationship Model. Slides by Jeffrey Ullman Modified by J. Welch to replace beers with candies. Purpose of E/R Model. The E/R model allows us to sketch database designs. Kinds of data and how they connect. Not how data changes.

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670 views • 54 slides
Database Systems ( ????? )

Database Systems ( ????? )

Database Systems ( ????? ). September 24, 2014 Lecture #2. Course Administration. http://www.csie.ntu.edu.tw/~winston/courses/dms/ HW #1 will be on the course homepage now It is due on Oct 8. Next week reading: R&G Chapters 3 & 4.1~4.2. TA Updates. TAs

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402 views • 40 slides
Department of Computer and Information Science, School of Science, IUPUI

Department of Computer and Information Science, School of Science, IUPUI

Department of Computer and Information Science, School of Science, IUPUI. Data Modeling Design Techniques. Dale Roberts, Lecturer Computer Science, IUPUI E-mail: droberts@cs.iupui.edu. Design Techniques. Avoid redundancy. Limit the use of weak entity sets.

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267 views • 13 slides
Department of Computer and Information Science, School of Science, IUPUI

Department of Computer and Information Science, School of Science, IUPUI

Department of Computer and Information Science, School of Science, IUPUI. Data Modeling Design Techniques. Dale Roberts, Lecturer Computer Science, IUPUI E-mail: droberts@cs.iupui.edu. Design Techniques. Avoid redundancy. Limit the use of weak entity sets.

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133 views • 13 slides

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