DATABASE SYSTEM CONCEPTS (LOOSELEAF)
7th Edition
ISBN: 9781260515046
Author: SILBERSCHATZ
Publisher: MCG
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Chapter 6, Problem 2PE
Explanation of Solution
a.
ER diagram for the Model exam:
Explanation:
In the above ER diagram, “Student”, “Section”, “Exam”, and “Course” are the entities.
- The “Student” entity contains “stud_ID”, “Name”, “tot_credit”, and “dept_Name” attributes. Here, “stud_ID” is a primary key.
- The “Section” entity contains “sec_ID”, “course_ID”, “sem”, and “year” are the attributes. Here, all the attributes are primary keys.
- The “Exam” entity contains “exam_ID”, “time”, “place” and “Name” are the attributes...
Program Plan Intro
Entity-Relationship diagram:
- Entity-Relationship (ER) diagram is the method to represent the relational
database using graphical form. - This graphical representation shows only primary elements such as records, types, attributes, relationships between entities, and so on.
- The graphical representation of the ER diagram clearly describes the relationship among entities.
- In the diagram, every connector is labeled.
- On one side it is represented by the value 1, and on the other side it is labeled with the value “M”. This labeling is referred to as “cardinality constraint” of the relationship.
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Chapter 6 Solutions
DATABASE SYSTEM CONCEPTS (LOOSELEAF)
Ch. 6 - Prob. 1PECh. 6 -
Consider a database that includes the entity sets...Ch. 6 -
Design an E-R diagram for keeping track of the...Ch. 6 - Prob. 4PECh. 6 - Prob. 5PECh. 6 - Prob. 6PECh. 6 - Prob. 7PECh. 6 -
Consider a relation such as sec_course, generated...Ch. 6 -
Suppose the advisor relationship set were...Ch. 6 - Prob. 10PE
Ch. 6 - Prob. 11PECh. 6 - Prob. 12PECh. 6 - Prob. 13PECh. 6 - Prob. 14ECh. 6 - Prob. 15ECh. 6 - Prob. 16ECh. 6 - Prob. 17ECh. 6 -
Consider two entity sets A and B that both have...Ch. 6 - Prob. 19ECh. 6 - Prob. 20ECh. 6 - Prob. 21ECh. 6 - Prob. 22ECh. 6 - Prob. 23ECh. 6 -
Design a database for an airline. The database...Ch. 6 - Prob. 25ECh. 6 -
Design a generalization – specialization...Ch. 6 -
Explain the distinction between disjoint and...Ch. 6 -
Explain the distinction between total and partial...
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