Define in SQL-like syntax a view of the engineering database V(ENO, ENAME, PNO, RESP), where the duration is 24. Is view V updatable? Assume that relations EMP and ASG are horizontally fragmented based on access frequencies as follows: Site 1 Site 2 Site 3 EMP1 EMP2 ASG1 ASG2 Where EMP1 = ?TITLE ≠“Engineer.”(EMP) EMP2 = ?TITLE =“Engineer.”(EMP) ASG1 = ?0 < DUR < 36(ASG) ASG2 = ?DUR ≥ 36(ASG) At which site(s) should the definition of V be stored without being fully replicated, to increase locality of reference?
Define in SQL-like syntax a view of the engineering database V(ENO, ENAME, PNO, RESP), where the duration is 24. Is view V updatable? Assume that relations EMP and ASG are horizontally fragmented based on access frequencies as follows: Site 1 Site 2 Site 3 EMP1 EMP2 ASG1 ASG2 Where EMP1 = ?TITLE ≠“Engineer.”(EMP) EMP2 = ?TITLE =“Engineer.”(EMP) ASG1 = ?0 < DUR < 36(ASG) ASG2 = ?DUR ≥ 36(ASG) At which site(s) should the definition of V be stored without being fully replicated, to increase locality of reference?
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...
Related questions
Question
Define in SQL-like syntax a view of the engineering
where the duration is 24. Is view V updatable? Assume that relations EMP and ASG are horizontally fragmented based on access frequencies as follows:
|
Site 1 |
Site 2 |
Site 3 |
|
EMP1 |
EMP2 |
|
|
|
ASG1 |
ASG2 |
Where
EMP1 = ?TITLE ≠“Engineer.”(EMP)
EMP2 = ?TITLE =“Engineer.”(EMP)
ASG1 = ?0 < DUR < 36(ASG)
ASG2 = ?DUR ≥ 36(ASG)
At which site(s) should the definition of V be stored without being fully replicated, to increase locality of reference?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
Recommended textbooks for you
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 Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
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 Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
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
Computer Engineering
ISBN:
9781337093422
Author:
Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:
Cengage Learning
Prelude to Programming
Computer Engineering
ISBN:
9780133750423
Author:
VENIT, Stewart
Publisher:
Pearson Education
Sc Business Data Communications and Networking, T…
Computer Engineering
ISBN:
9781119368830
Author:
FITZGERALD
Publisher:
WILEY