Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 5, Problem 8C
Explanation of Solution
Crow’s Foot ER diagram for MARU art school:
The following data model shows the solution for the given question.
Explanation:
- In the above data model, “Student” entity contains “Stud_No” as primary key and details of the student are present in the “Student” entity.
- The “Instructors” is a subtype of “Student” entity. Here same “Stud_No” is the primary and foreign key. The “Student” supertype entity has optional “Instructors” entity.
- The many class is assigned to one instructor so one-to-many relationship is used...
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Problem: JMS TechWizards is a local company that provides technical services to several small businesses in the area. The company currently keeps its technicians and clients’ records on papers. The manager requests you to create a database to store the technician and clients’ information.
The following table contains the clients’ information.
Client Number
Client Name
Street
City
State
Postal Code
Telephone Number
Billed
Paid
Technician Number
AM53
Ashton-Mills
216 Rivard
Anderson
TX
78077
512-555-4070
$315.50
$255.00
22
AR76
The Artshop
722 Fisher
Liberty Corner
TX
78080
254-555-0200
$535.00
$565.00
23
BE29
Bert's Supply
5752 Maumee
Liberty Corner
TX
78080
254-555-2024
$229.50
$0.00
23
DE76
D & E Grocery
464 Linnell
Anderson
TX
78077
512-555-6050
$485.70…
An insurance company needs to store their salespeople’s information who are selling their insurance policies. They already have a database with multiple tables, one of the tables (Salesperson) stores information about each salesperson along with the bonus percent they receive, based on the city where the insurance is sold. The table has the following fields:
Salesperson(spID, spName, spBirthDate,spCitySelling, bonusPercent)
spID: Unique identification number of the salesperson.
spName: Full name of the salesperson.
spBirthDate: Birthdate of the salesperson.
spCitySelling: The city in which the salesperson is selling the insurance.
bonusPercent: The bonus percent received by the salesperson based on the city in which he/she sells the insurance.
Each salesperson can sell the insurance in just one city. However, for a city, there can be more than one salesperson appointed. Also, the bonus percent is fixed for each city. For example, all of the salespeople who sells insurance in…
Chapter 5 Solutions
Database Systems: Design, Implementation, & Management
Ch. 5 - Prob. 1RQCh. 5 - What kinds of data would you store in an entity...Ch. 5 - Prob. 3RQCh. 5 - What is a subtype discriminator? Give an example...Ch. 5 - Prob. 5RQCh. 5 - What is the difference between partial...Ch. 5 - Prob. 7RQCh. 5 - According to the data model, is it required that...Ch. 5 - Prob. 9RQCh. 5 - Prob. 10RQ
Ch. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - When implementing a 1:1 relationship, where should...Ch. 5 - What is time-variant data, and how would you deal...Ch. 5 - Prob. 16RQCh. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 8CCh. 5 - Prob. 9CCh. 5 - Prob. 10C
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