Answered: You are given the following schema of a…

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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Question

You are given the following schema of a University, where primary keys of each table are
underlined and symbol (#) symbolises foreign keys:
Student (student_id, first_name, last_name, date_of_birth)
Course (course_id, #professor_id, course_name, credits, programme)
Exam (#student_id, #course_id, exam_date, grade)
Professor (professor_id, first_name, last_name, research_field)

-Use DOMAIN or TUPLE RELATIONAL CALCULUS to write the
following queries:
a) Find the last names of professors who have taught a course with 6 credits
b) Find all student IDs of students who are born before January 1, 1999 or have passed at least
one exam with a 10
c) Find the last names of professors who have never taught a course
d) Find the last name(s) of the professor(s) who teach the most courses

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