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 9, Problem 5P
Explanation of Solution
Design of video rental
The below is the design of video rental database that includes the support of all rental activities such as customer payment, work schedule of the employee, checkout which employee has processed the videos for the customers.
Explanation:
- Every movie is classified based on the type and the relationship between MOVIE and TYPE is N:1.
- One movie gets rented many times and the relationship between the MOVIE and RENTAL is 1:N.
- Every customer needs to pay for the rental made and the relationship between CUSTOMER and RENTAL is 1:N.
- Employee gathers details and writes about the rental made and the relationship between EMPLOYEE and RENTAL is 1:N.
- Every employee sign a work log and the relationship between the EMPLOYEE and WORK_LOG is 1:N
- Every schedule of the Employee gets enters and the relationship between the EMPLOYEE and Schedule is 1:N...
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Go to the Webinars DeShawn wants to determine the number of webinars the company can hold on Tuesdays and Thursdays to make the highest weekly profit without interfering with consultations, which are also scheduled for Tuesdays and Thursdays and use the same resources. Use Solver to find this information as follows:
Use Total weekly profit as the objective cell in the Solver model, with the goal of determining the maximum value for that cell.
Use the number of Tuesday and Thursday sessions for the five programs as the changing variable cells.
Determine and enter the constraints based on the information provided in Table 3.
Use Simplex LP as the solving method to find a global optimal solution.
Save the Solver model below the Maximum weekly profit model label.
Solve the model, keeping the Solver solution.
Table 3: Solver Constraints
Constraint
Cell or Range
Each webinar is scheduled at least once on Tuesday and once on Thursday
B4:F5
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Chapter 9 Solutions
Database Systems: Design, Implementation, & Management
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