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 4P
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 “Employee” is the supertype entity of “Staff”, “Admin” and “Professor” subtypes and the primary key of “Employee” entity is “Emp_No”. The primary and foreign key of these subtypes are “Emp_No”. Another foreign key of “Professor” entity is “Dept_Code”.
- The overlapping constraint (o) is used as a category symbol. Here the “Employee” supertype entity has optional subtype entity.
- The “Student” table contains the details of students and every student can get advices from the “Staff” table...
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In Chapter 4, you saw the creation of the Tiny College database design, which reflected such business rules as "a professor may advise many students" and "a professor may chair one department." Modify the design shown in Figure 4.35 to include these business rules:
An employee could be staff, a professor, or an administrator.
A professor may also be an administrator.
Staff employees have a work-level classification, such as Level I or Level II.
Only professors can chair a department. A department is chaired by only one professor.
Only professors can serve as the dean of a college. Each of the university's colleges is served by one dean.
A professor can teach many classes.
Administrators have a position title.
Given that information, create the complete ERD that contains all primary keys, foreign keys, and main attributes.
In Chapter 4, you saw the creation of the Tiny College database design. That design reflected such business rules as “a professor may advise many students” and “a professor may chair one department.” Modify the design shown in Figure 4.36 to include these business rules:
An employee could be staff or a professor or an administrator.
A professor may also be an administrator.
Staff employees have a work level classification, such a Level I and Level II.
Only professors can chair a department. A department is chaired by only one professor.
Only professors can serve as the dean of a college. Each of the university’s colleges is served by one dean.
A professor can teach many classes.
Administrators have a position title.
Given that information, create the complete ERD containing all primary keys, foreign keys, and main attributes.
**Link to previous source acceptable
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1. Let's say you're a database designer for a logistics company. Your task is to design a databaseto store information about the company's trucks, drivers, shipments, and customers. (1) Each truck has a unique id, information about its make and model, and its capacity.Each shipment has a unique id, as well as information about its origin, destination, andweight. Each customer has a unique id and information about their name, address, andphone number. Each driver has a unique id and information about their name, licensenumber, and level of experience.(2) A truck can transport one or more shipments, and each shipment can be transportedby one or more trucks. A customer can have one or more shipments, and each shipmentcan belong to one customer. a driver can drive one or more trucks, and each truck can bedriven by one or more drivers.
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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