The relational database schemas are as follows: department(dept-name, building, budget) instructor(ID, name, dept-name, salary) student(ID, name, dept-name, tot-cred) advisor(s-ID, i-ID) course(course-id, title, dept-name, credits) teaches(ID, course-id, sec-id, semester, year) takes(ID, course-id, sec-id, semester, year, grade) classroom(building, room-number, capacity) time-slot(time-slot-id, day, start-time, end-time) section(course-id, sec-id, semester, year, building, room-number, time-slot-id) prereq(course-id, prereq-id)
Using the relational
4) How many instructors are advising more than three students?
5) Which department has the highest number of students?
6) Which courses have multiple prerequisites? Sort the list.
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The relational database schemas are as follows:
department(dept-name, building, budget)
instructor(ID, name, dept-name, salary)
student(ID, name, dept-name, tot-cred)
advisor(s-ID, i-ID)
course(course-id, title, dept-name, credits)
teaches(ID, course-id, sec-id, semester, year)
takes(ID, course-id, sec-id, semester, year, grade)
classroom(building, room-number, capacity)
time-slot(time-slot-id, day, start-time, end-time)
section(course-id, sec-id, semester, year, building, room-number, time-slot-id)
prereq(course-id, prereq-id)
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