Please refer to the following diagram for Q19 to Q20. PERSON PK | P_ID |P_LNAME P_FNAME ΕMPLOYHΕ P_ID STUDENT P_ID STUDY_MAJOR РК, FKI РК, FK1 EMP HIRE DATE

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
icon
Related questions
Question
Please refer to the following diagram for Q19 to Q20.
PERSON
PK P_ID
P_LNAME
P_FNAME
EMPLOYEE
P_ID
EMP_HIRE_DATE
STUDENT
P ID
STUDY_MAJOR
PK, FK1
PK, FK1
Transcribed Image Text:Please refer to the following diagram for Q19 to Q20. PERSON PK P_ID P_LNAME P_FNAME EMPLOYEE P_ID EMP_HIRE_DATE STUDENT P ID STUDY_MAJOR PK, FK1 PK, FK1
20. If P_Phone is an attribute of Person, then which of the following statements is/are true?
(1) Every Employee also has P_Phone as an attribute.
(2) A Student can have P_Phone number if only if he/she is not an Employee.
(3) The attribute P_Phone must also be defined in Student and Employee.
a. (1) only
b. (1) and (3) only
c. (2) and (3) only
d. (1), (2) and (3).
Transcribed Image Text:20. If P_Phone is an attribute of Person, then which of the following statements is/are true? (1) Every Employee also has P_Phone as an attribute. (2) A Student can have P_Phone number if only if he/she is not an Employee. (3) The attribute P_Phone must also be defined in Student and Employee. a. (1) only b. (1) and (3) only c. (2) and (3) only d. (1), (2) and (3).
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Similar questions
Recommended textbooks for you
Computer Networking: A Top-Down Approach (7th Edi…
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
Computer Organization and Design MIPS Edition, Fi…
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
Network+ Guide to Networks (MindTap Course List)
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
Concepts of Database Management
Concepts of Database Management
Computer Engineering
ISBN:
9781337093422
Author:
Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:
Cengage Learning
Prelude to Programming
Prelude to Programming
Computer Engineering
ISBN:
9780133750423
Author:
VENIT, Stewart
Publisher:
Pearson Education
Sc Business Data Communications and Networking, T…
Sc Business Data Communications and Networking, T…
Computer Engineering
ISBN:
9781119368830
Author:
FITZGERALD
Publisher:
WILEY