Modern Database Management (12th Edition)
12th Edition
ISBN: 9780133544619
Author: Jeffrey A. Hoffer, Ramesh Venkataraman, Heikki Topi
Publisher: PEARSON
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Chapter 3, Problem 3.29PAE
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An ERR diagram, the Visio notation or the subtypes inside supertypes notation.
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Prepare an Entity Relationship Diagram for the application described in the following paragraph.
Pick and Shovel Construction Company is a multi-state building contractor specializing in medium-priced town homes. Assume that Pick and Shovel’s main entities are its customers, employees, projects and equipment. A customer can hire the company for more than one project, and employees sometimes work on more than one project at a time. Equipment, however, is assigned to only one project at a time. Draw an ERD showing those entities.
Consider the following entity relationship diagram.
Booking
Employee
Room
Building
• Booking ID
• Employee ID
• Building ID
• Room ID
• First Name
• Room ID P
• Name
Description
• Employee ID
• Name
Last Name
• Date
• Campus Zone
• Email Address
• Capacity
• Start Time
• Map Coordinates
Phone
• Bookable
• End Time
For each statement below, use the drop-down box to indicate whether it is true (answer 1) or false (answer2), according to the design decisions encoded in the ERD.
Every booking is associated with exactly one employee.
✓ Every employee is associated with at most one booking.
✓ A building may contain no rooms that are recorded in the database.
Each room may have many bookings.
1. True
✓ A room must have at least one booking.
2. False
✓ A booking can be associated with many employees.
An employee may have no phone number recorded.
✓ A room must have its capacity recorded.
✓ A building is uniquely identified by its map coordinates.
Draw an EER diagram for the following problem using this text’s EER notation, the Visio notation, or the subtypes inside supertypes notation, as specified by your instructor. A nonprofit organization depends on a number of different types of persons for its successful operation. Theorganization is interested in the following attributes for all of these persons: SSN, Name, Address, City/State/Zip, and Telephone. Three types of persons are of greatest interest: employees, volunteers, and donors.Employees have only a Date Hired attribute, and volunteershave only a Skill attribute. Donors have only arelationship (named Donates) with an Item entity type.A donor must have donated one or more items, and anitem may have no donors, or one or more donors.There are persons other than employees, volunteers,and donors who are of interest to the organization so thata person need not belong to any of these three groups. Onthe other hand, at a given time a person may belong totwo or more of these…
Chapter 3 Solutions
Modern Database Management (12th Edition)
Ch. 3 - Define each of the following terms: supertype...Ch. 3 - Prob. 3.2RQCh. 3 - Contrast the following terms: supertype; subtype...Ch. 3 - State two conditions that indicate when a database...Ch. 3 - Prob. 3.5RQCh. 3 - Give an example (other than those discussed in the...Ch. 3 - What is the attribute inheritance? Why is it...Ch. 3 - Give an example of each of the following: a...Ch. 3 - What types of business rules are normally captured...Ch. 3 - What is the purpose of a subtype discriminator?
Ch. 3 - Prob. 3.11RQCh. 3 - In what ways is starting a data modeling project...Ch. 3 - Prob. 3.13RQCh. 3 - Prob. 3.14RQCh. 3 - What do you purchase when you acquire a packaged...Ch. 3 - Prob. 3.16RQCh. 3 - When is a member of a supertype always a member of...Ch. 3 - Examine the hierarchy for the university EER...Ch. 3 - Add a subtype discriminator for each of the...Ch. 3 - For simplicity, subtype discriminators were left...Ch. 3 - Refer to the employee EER diagram in Figure 3-2....Ch. 3 - Refer to the EER diagram for patients in Figure...Ch. 3 - Figure 3-13 shows the development Of entity...Ch. 3 - Refer to Problem and Exercise 2-44 in Chapter 2...Ch. 3 - For a library, the entity type HOLDING has four...Ch. 3 - A bank has three types of accounts: checking,...Ch. 3 - Refer to your answer to Problem and Exercise 2-4...Ch. 3 - Refer to your answer to Problem and Exercise 3-24...Ch. 3 - Prob. 3.29PAECh. 3 - Prob. 3.30PAECh. 3 - Develop an EER model for the following situation,...Ch. 3 - Draw an EER diagram for the following description...Ch. 3 - Prob. 3.33PAECh. 3 - Prob. 3.34PAECh. 3 - Based on the EER diagram constructed for Problem...Ch. 3 - Prob. 3.36PAECh. 3 - Prob. 3.37PAECh. 3 - Add the following to Figure 3-16: An EMPLOYMENT...
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- Assignment: Problem #7 from Chapter 4 of the textbook. The case study is United Helpers. With the use of Microsoft Visio, draw YOUR entity relationship diagram (ERD) using Crow's foot notation to indicate entities, relationships, optionalities, connectivities and cardinalities. In addition, be sure to include a heading on your ERD with a brief descriptive title, your name, and a date. It is suggest that you write out business rules but the rules do not need to be submitted. 7. How would you (graphically) identify each of the following ERM components in a Crow’s Foot notation? an entity the cardinality (0,N) a weak relationship a strong relationshiparrow_forwardDraw an Entity Relationship Diagram for ther following information.arrow_forwardEntity-Relationship Diagram (ERD) is one of the data modeling tools that provides a software engineer with the ability to represent data objects, their characteristics, and their relationships. Use an ERD to describe the following scenario. A teacher is identified by an ID number (TID), last name (LName), and first name (FName). A project is identified by a project ID (PID) and title (T). A student is identified by an ID number (SID), last name (LName), and first name (FName). A teacher can supervise zero, one, or many students and a student is supervised by one teacher. A teacher must propose one or many projects and every project is proposed by one teacher. A student must work on one project and every project is worked by only one student.arrow_forward
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