Computer Science 1.Consider a conceptual schema in which the only fact type associated with Department (code) is: Department at Level {UG, PG} has students in Quantity. Here “UG” and “PG” abbreviate “undergraduate” and “postgraduate”, respectively. The role played by Department has a frequency constraint of 2. Let a focused query be: What is the ratio of postgraduate to undergraduate enrollments for the department of computer science? (a) Draw the conceptual fact type, and Rmap it. (b) Optimize the conceptual (sub)schema, and Rmap it. (c) Although primarily identified by its code (e.g., “CS”), each department also has a unique name (e.g., “Computer Science”) which is now mandatorily recorded. The enrollment figures are now optional, but if any figures are recorded, both UG and PG figures are required. Draw the new conceptual schema and Rmap it. (d) Optimize the new conceptual schema, and Rmap i
Computer Science 1.Consider a conceptual schema in which the only fact type associated with Department (code) is: Department at Level {UG, PG} has students in Quantity. Here “UG” and “PG” abbreviate “undergraduate” and “postgraduate”, respectively. The role played by Department has a frequency constraint of 2. Let a focused query be: What is the ratio of postgraduate to undergraduate enrollments for the department of computer science? (a) Draw the conceptual fact type, and Rmap it. (b) Optimize the conceptual (sub)schema, and Rmap it. (c) Although primarily identified by its code (e.g., “CS”), each department also has a unique name (e.g., “Computer Science”) which is now mandatorily recorded. The enrollment figures are now optional, but if any figures are recorded, both UG and PG figures are required. Draw the new conceptual schema and Rmap it. (d) Optimize the new conceptual schema, and Rmap i
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...
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Computer Science
1.Consider a conceptual schema in which the only fact type associated with Department (code) is: Department at Level {UG, PG} has students in Quantity. Here “UG” and “PG” abbreviate “undergraduate” and “postgraduate”, respectively. The role played by Department has a frequency constraint of 2. Let a focused query be: What is the ratio of postgraduate to undergraduate enrollments for the department of computer science? (a) Draw the conceptual fact type, and Rmap it. (b) Optimize the conceptual (sub)schema, and Rmap it. (c) Although primarily identified by its code (e.g., “CS”), each department also has a unique name (e.g., “Computer Science”) which is now mandatorily recorded. The enrollment figures are now optional, but if any figures are recorded, both UG and PG figures are required. Draw the new conceptual schema and Rmap it. (d) Optimize the new conceptual schema, and Rmap it.
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