'Relational schema design' presentation slideshows

Relational schema design - PowerPoint PPT Presentation

Design (Chapter 19)

Design (Chapter 19)

Design (Chapter 19). Introduction. Typically, the first database design uses a high-level database model such as the ER model This model is then translated into a relational schema Sometimes a relational database schema is developed directly without going through the high-level design

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1.26k views • 114 slides
IT 244 Database Management System

IT 244 Database Management System

IT 244 Database Management System. Topic 7 The Relational Data Model Functional Dependencies Ref : - A First Course in Database System (Jeffrey D Ullman, Jennifer Widom) + online. Functional Dependencies.

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804 views • 67 slides
Design Theory for Relational Databases (cf. Chapter 3)

Design Theory for Relational Databases (cf. Chapter 3)

Design Theory for Relational Databases (cf. Chapter 3). Functional Dependencies Decompositions Normal Forms. acknowledgment: slides by Jeff Ullman @ Stanford. Functional Dependencies.

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747 views • 65 slides
Lecture 11: Functional Dependencies

Lecture 11: Functional Dependencies

Lecture 11: Functional Dependencies. January 31 st , 2003. Outline. Relational decomposition Normal forms Begin relational algebra . Relational Schema Design. Recall set attributes (persons with several phones):. SSN ? Name, City , but not SSN ? PhoneNumber. Anomalies:

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575 views • 44 slides
Normalization

Normalization

Normalization. Anomalies Boyce-Codd Normal Form 3 rd Normal Form. Source: Slides by Jeffrey Ullman. Anomalies. Goal of relational schema design is to avoid anomalies and redundancy. Update anomaly : one occurrence of a fact is changed, but not all occurrences.

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350 views • 27 slides

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