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 5P
Explanation of Solution
Crow’s Foot ER diagram for Tiny College:
The following data model shows the solution for the given question.
Explanation:
- In the above data model, the overlapping constraint (o) is used as a category symbol. Here the “Employee” supertype entity has optional subtype entity.
- The “Professor” and “School” are the current data entities which mean the user can get the data from the current
database ...
Expert Solution & Answer
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Students have asked these similar questions
Observe the table ENROLLMENT:
ENROLLMENT
StudentID
StudentName MajorID MajorName
111
Joe
E
English
222
Bob
H
History
333
Lisa
H
History
Which of the following (regarding the relation ENROLLMENT) represents the deletion anomaly?
O Deleting a major ID may delete the major name
O Deleting a major may delete all information about a student
O None of the answers
O Deleting a student ID may delete a student name
O Deleting a student may delete all information about a major
Observe the table ENROLLMENT:
ENROLLMENT
StudentID
StudentName MajorID MajorName
111
Joe
E
English
222
Bob
H
History
333
Lisa
H
History
Which of the following (regarding the relation ENROLLMENT) represents the modification anomaly?
O If a major name changes, it may have to be changed in more than one record
O If a student decides to use a longer version of his or her name, we cannot accommodate that modification
O If a student ID changes, we may have to change the major ID as well
O If a major ID changes, we may have to change the student ID as well
O All of these answers
StayWell also rents out properties on a weekly basis to students attending summer school in the Seattle area. Design a database to meet the following requirements, using the shorthand representation and a diagram of your choice.
For each student renter, list his or her number, first name, middle initial, last name, address, city, state, postal code, telephone number, and e-mail address.
For each property, list the office number, property address, city, state, postal code, square footage, number of bedrooms, number of floors, maximum number of persons that can sleep in the unit, and the base weekly rate.
For each rental agreement, list the renter number, first name, middle initial, last name, address, city, state, postal code, telephone number, start date of the rental, end date of the rental, and the weekly rental amount. The rental period is one or more weeks.
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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