Database Systems: Design, Implementation, & Management
11th Edition
ISBN: 9781285196145
Author: Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 4, Problem 9C
Explanation of Solution
Entity Relational (ER) Diagram:
The following figure illustrates the ER Diagram for given business rules in Crow’s Foot notation:
Explanation:
The above The Tiny College (TFBS Maintenance) ERD contains entities such as “LOG”, “VECHICLE”, “LOG_LINE”, “ACTION”, “
- The relationship between the “VECHICLE” and “LOG” entities is 1: M. It is a weak relationship because the VECHICLE’s PK is included as FK in LOG entity...
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You are the CTO of a startup based out of Arlington, VA that needs to setup a database to keep track of the details of the customers: last name, first name, customer ID, street address, customer star rating (a rating on a 1 – 5 scale, with 5 being best, representing the type of customer) and phone number. It also needs to keep track of similar information for suppliers as well (although instead of supplier first and last name, there will just be a supplier company name). The database should maintain the data on products that are offered. Information about which product is offered by which supplier should also be maintained. Finally, which customers have purchased which products should also be tracked (note that we are only interested in which customers bought which product, but not concerned about the date or how many were bought).1.1 Business RulesAssumptions for the business model are as follows: • Only customers that have purchased one or more products will exist in the database. • Only…
You are the CTO of a startup based out of Arlington, VA that needs to setup a database to keep track of the details of the customers: last name, first name, customer ID, street address, customer star rating (a rating on a 1 – 5 scale, with 5 being best, representing the type of customer) and phone number. It also needs to keep track of similar information for suppliers as well (although instead of supplier first and last name, there will just be a supplier company name). The database should maintain the data on products that are offered. Information about which product is offered by which supplier should also be maintained. Finally, which customers have purchased which products should also be tracked (note that we are only interested in which customers bought which product, but not concerned about the date or how many were bought).
1.1 Business Rules
Assumptions for the business model are as follows:
Only customers that have purchased one or more products will exist in the database.…
Case Problem 1
The administrators of Tiny College are so pleased with your design and implementation of their student registration and tracking system that they want you to expand the design to include the database for their motor vehicle pool. A brief description of operations follows:
Faculty members may use the vehicles owned by Tiny College for officially sanctioned travel. For example, the vehicles may be used by faculty members to travel to off-campus learning centers, to travel to locations at which research papers are presented, to transport students to officially sanctioned locations, and to travel for public service purposes. The vehicles used for such purposes are managed by Tiny College’s Travel Far But Slowly (TFBS) Center.
Using reservation forms, each department can reserve vehicles for its faculty, who are responsible for filling out the appropriate trip completion form at the end of a trip. The reservation form includes the expected departure date, vehicle type…
Chapter 4 Solutions
Database Systems: Design, Implementation, & Management
Ch. 4 - Prob. 1RQCh. 4 - What is a strong (or identifying) relationship,...Ch. 4 - Prob. 4RQCh. 4 - Suppose you are working within the framework of...Ch. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Discuss the difference between a composite key and...Ch. 4 - What two courses of action are available to a...Ch. 4 - Prob. 11RQCh. 4 - Discuss two ways in which the 1:M relationship...
Ch. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Briefly, but precisely, explain the difference...Ch. 4 - What are multivalued attributes, and how can they...Ch. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - What two attributes must be contained in the...Ch. 4 - Describe precisely the composition of the...Ch. 4 - Prob. 21RQCh. 4 - Prob. 1PCh. 4 - Create a complete ERD in Crows Foot notation that...Ch. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9C
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