Homework Help is Here – Start Your Trial Now!
Engineering
Computer Engineering
Given the following query SELECT StudID, CourseTitle, Credits FROM Enrollment, Course WHERE Enrollment.CourseTitle = Course.CourseTitle AND Enrollment.Decision = TRUE and Course.Credits > 4 which of the following indexes could NOT be useful in speeding-up the query? a) tree-based index on Enrollment.CourseTitle b) hash-based index on Enrollment.Decision c) hash-based index on Course.CourseTitle d) hash-based index on Course.Credits   Can someone explain me step by step which is the correct answer and why,please?

Given the following query SELECT StudID, CourseTitle, Credits FROM Enrollment, Course WHERE Enrollment.CourseTitle = Course.CourseTitle AND Enrollment.Decision = TRUE and Course.Credits > 4 which of the following indexes could NOT be useful in speeding-up the query? a) tree-based index on Enrollment.CourseTitle b) hash-based index on Enrollment.Decision c) hash-based index on Course.CourseTitle d) hash-based index on Course.Credits   Can someone explain me step by step which is the correct answer and why,please?

Computer Networking: A Top-Down Approach (7th Edition)
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...
See similar textbooks
icon
Related questions
Question

Given the following query


SELECT StudID, CourseTitle, Credits
FROM Enrollment, Course
WHERE Enrollment.CourseTitle = Course.CourseTitle AND
Enrollment.Decision = TRUE and Course.Credits > 4
which of the following indexes could NOT be useful in
speeding-up the query?

a) tree-based index on Enrollment.CourseTitle
b) hash-based index on Enrollment.Decision
c) hash-based index on Course.CourseTitle
d) hash-based index on Course.Credits

 

Can someone explain me step by step which is the correct answer and why,please? 

Expert Solution
steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
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
SEE MORE TEXTBOOKS