Consider a database that includes the entity sets student, course, and section from the university schema and that additionally records the marks that students receive in different exams of different sections. a. Construct an E-R diagram that models exams as entities and uses a ternary relationship as part of the design. b. Construct an alternative E-R diagram that uses only a binary relationship between student and section. 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.
Consider a database that includes the entity sets student, course, and section from the university schema and that additionally records the marks that students receive in different exams of different sections. a. Construct an E-R diagram that models exams as entities and uses a ternary relationship as part of the design. b. Construct an alternative E-R diagram that uses only a binary relationship between student and section. 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.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Consider a
from the university schema and that additionally records the marks that students
receive in different exams of different sections.
a. Construct an E-R diagram that models exams as entities and uses a ternary
relationship as part of the design.
b. Construct an alternative E-R diagram that uses only a binary relationship
between student and section. 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.
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