EBK MODERN DATABASE MANAGEMENT,
13th Edition
ISBN: 9780134792279
Author: TOPI
Publisher: YUZU
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Chapter 2, Problem 2.23PAE
A cellular operator needs a
Can a customer have an unlimited number of plans?- Can a customer exist without a plan?
- Is it possible to create a plan without knowing who the customer is?
- Does the operator want to limit the types of handsets that can be linked to a specific plan type?
- Is it possible to maintain data regarding a handset without connecting it to a plan?
- Can a handset be associated with multiple plans?
- Assume a handset type exists that can utilize multiple operating systems. Could this situation be accommodated within the model included in Figure 2-24?
- Is the company able to track a manufacturer without maintaining information about its handsets?
- Can the same
operating system be used on multiple handset types? - There are two relationships between Customer and Plan. Explain how they differ.
- Characterize the degree and the cardinalities of the relationship that connects Customer to itself. Explain its meaning.
- Is it possible to link a handset to a specific customer in a plan with multiple customers?
- Can the company track a handset without identifying its operating system?
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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
Each Tuesday and Thursday…
Chapter 2 Solutions
EBK MODERN DATABASE MANAGEMENT,
Ch. 2 - Define each of the following terms: entity type...Ch. 2 - Match the following terms and definitions....Ch. 2 - Contrast the following terms: stored attribute;...Ch. 2 - Prob. 2.4RQCh. 2 - Prob. 2.5RQCh. 2 - Prob. 2.6RQCh. 2 - State six general guidelines for naming data...Ch. 2 - Prob. 2.8RQCh. 2 - Prob. 2.9RQCh. 2 - State three conditions that suggest the designer...
Ch. 2 - List the four types of cardinality constraints,...Ch. 2 - Give an example, Other than those described in...Ch. 2 - What is the degree of a relationship? List the...Ch. 2 - Give an example (Other than those described in...Ch. 2 - Give an example of each of the following, other...Ch. 2 - Give an example of the use of effective (or...Ch. 2 - State a rule that says when to extract an...Ch. 2 - Prob. 2.18RQCh. 2 - In addition to explaining what action is being...Ch. 2 - For the Manages relationship in Figure 2-12a,...Ch. 2 - Explain the distinction between entity type and...Ch. 2 - Why is it recommended that every ternary...Ch. 2 - A cellular operator needs a database to keep track...Ch. 2 - Prob. 2.24PAECh. 2 - Answer the following questions concerning Figure...Ch. 2 - Prob. 2.26PAECh. 2 - You may have been assigned a CASE or a drawing...Ch. 2 - Consider the two E-R diagrams in Figure 2-25 Q,...Ch. 2 - Prob. 2.29PAECh. 2 - Are associative entities also weak entities? Why...Ch. 2 - Because Visio does not explicitly show associative...Ch. 2 - Figure 2-26 shows a grade report that is mailed to...Ch. 2 - Prob. 2.33PAECh. 2 - The Is Married To relationship in Figure 2-12a...Ch. 2 - Figure 2-27 represents a situation of students who...Ch. 2 - Figure 2-28 shows two diagrams (A and B), both of...Ch. 2 - Prob. 2.37PAECh. 2 - Review Figure 2-8LQ and Figure 2-22. Identify any...Ch. 2 - Prob. 2.39PAECh. 2 - Prob. 2.40PAECh. 2 - Prob. 2.41PAECh. 2 - Prob. 2.42PAECh. 2 - Prob. 2.43PAECh. 2 - Prob. 2.44PAECh. 2 - Prob. 2.45PAECh. 2 - Prob. 2.46PAECh. 2 - Prob. 2.47PAECh. 2 - Prob. 2.48PAECh. 2 - Draw an ERD for the following situation. (State...Ch. 2 - Prob. 2.50PAECh. 2 - Prob. 2.51PAECh. 2 - Review your answer to Problem and Exercise 2-49 if...
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