Slide 1CS 405G: Introduction to Database Systems Instructor: Jinze Liu Fall 2009 Slide 2 6/5/20142 Review A data model is a group of concepts for describing data. What are…

Slide 1 1 Convert E/R to Relation May 18, 2015 Slide 2 2 Entity Set -> Relation Relation: Beers(name, manf) Beers name manf Slide 3 3 Relationship -> Relation DrinkersBeers…

Slide 1 1 Entity-Relationship Model E/R Diagrams Weak Entity Sets Converting E/R Diagrams to Relations Slide 2 2 Purpose of E/R Model uThe E/R model allows us to sketch database…

Slide 1 DATABASE APPLICATION DEVELOPMENT SAK 3408 Database Design II (week 3) Slide 2 SAK3408 by PSS (W3) Try  Construct an E-R diagram for a video rental store that has…

Slide 1 1 Announcement Recitation time  Before midterm: 6-7pm, by Earl Wagner  After midterm: 5-6pm, by Yi Qiao Newsgroup safe to subscribe  Will not cause you to…

Slide 1 1 The Relational Data Model Tables Schemas Conversion from E/R to Relations Slide 2 2 A Relation is a Table namemanf WinterbrewPete’s Bud LiteAnheuser-Busch Beers…

Slide 1 1 Entity-Relationship Model Diagrams Class hierarchies Weak entity sets Slide 2 2 Purpose of E/R Model uThe E/R model allows us to sketch database designs. wKinds…

Slide 1 Chapter 4 Notes Slide 2 Entity-Relationship Model E/R Diagrams Weak Entity Sets Converting E/R Diagrams to Relations Slide 3 Purpose of E/R Model The E/R model allows…

Slide 1 1 Normalization Anomalies Boyce-Codd Normal Form 3 rd Normal Form Slide 2 2 Anomalies uGoal of relational schema design is to avoid anomalies and redundancy. wUpdate…