CSC 4402 Chapter : Csc4402 2011 Home4 Ans
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Answer key to csc4402 homework4 due wednesday october 26, 2011. Question 7. 2 (page 316) of the text book: Consider a database used to record the marks that students get in different exams of different course offerings (sections). Construct an e-r diagram that models exams as entities, and uses a ternary relationship (among students, sections and exams), for the database. Construct an alternative e-r diagram that uses only a binary relationship (you can call it. Make sure that only one relationship exists between a particular student and section pair, yet you can represent the marks that a student gets in different exams (of the same section). Answer: see the text book"s website: http://www. db-book. com/, click on "solutions to practice exercises" and then nd the answers in the pdf le for chapter 7. Question 7. 3 (page 317) of the text book: Design an e-r diagram for keeping track of the exploits of your favorite sports team.
