'Overuse weak entity sets' diaporamas de présentation

Entity-Relationship Model

Entity-Relationship Model. E-R Diagrams Class hierarchies Weak entity sets. Purpose of E/R Model. The E/R model allows us to sketch the design of a database informally. Designs are pictures called entity-relationship diagrams .

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Database Systems ( ????? )

Database Systems ( ????? ). September 27/28, 2006 Lecture #2. Course Administration. Office Hour: Thur 2-3 Can everyone get the textbook? HW #1 will be on the course homepage later today It is due 2 weeks from today. Next week reading: R&G Chapters 3 & 4.1~4.2.

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Database Systems ( ????? )

Database Systems ( ????? ). 9/27 10/1, 2007 Lecture #2. Course Administration. Office Hour: Thur 2-3 Can everyone get the textbook? HW #1 will be on the course homepage later today It is due 2 weeks from today. Next week reading: R&G Chapters 3 & 4.1~4.2.

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Overview of Database Systems

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Overview of Database Systems

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Overview of Database Systems

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