Consider the relation R, which has attributes that hold schedules of courses and sections at a university; R = {Course_no, Sec_no, Offering_dept, Credit hours, Course_level, Instructor_ssn, Semester, Year, Days_hours, Room_no, No_of_students). Suppose that the following functional dependencies hold on R: [Course_no] → [Offering_dept, Credit hours, Course_level] (Course_no, Sec_no, Semester, Year) → (Days_hours, Room_no, No_of_students, Instructor_ssn) (Room_no, Days_hours, Semester, Year) (Instructor_ssn, Course_no, Sec_no} Try to determine which sets of attributes form keys of R.
Consider the relation R, which has attributes that hold schedules of courses and sections at a university; R = {Course_no, Sec_no, Offering_dept, Credit hours, Course_level, Instructor_ssn, Semester, Year, Days_hours, Room_no, No_of_students). Suppose that the following functional dependencies hold on R: [Course_no] → [Offering_dept, Credit hours, Course_level] (Course_no, Sec_no, Semester, Year) → (Days_hours, Room_no, No_of_students, Instructor_ssn) (Room_no, Days_hours, Semester, Year) (Instructor_ssn, Course_no, Sec_no} Try to determine which sets of attributes form keys of R.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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14.28. Consider the relation R, which has attributes that hold schedules of courses and sections at a university; R = {Course_no, Sec_no, Offering_dept, Credit hours, Course_level, Instructor_ssn, Semester, Year, Days_hours, Room_no, No_of_students). Suppose that the following functional dependencies hold on R:
[Course_no] → [Offering_dept, Credit hours, Course_level]
(Course_no, Sec_no, Semester, Year) → (Days_hours, Room_no, No_of_students, Instructor_ssn)
(Room_no, Days_hours, Semester, Year) (Instructor_ssn, Course_no, Sec_no}
Try to determine which sets of attributes form keys of R. How would you
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