Consider the relations Courses1, Courses2, Enrollment and Students. Courses cid ename Al Calculus A2 Algebra Location LI L2 A5 English L3 Student(sid, sname, age, level) Courses2 cid Classroom A5 L3 Bl L4 B2 Computing LS name English History b) Courses 1-Courses2 (1) Give the results of the following relational algebra expressions: a) Teid ( name="History' OR 'Computing (Courses2)) c) Courses Courses2 d) Courses1 Enrollment Enrollment sid cid 101 Al 102 A5 103 BI 102 A1 102 A2 e) Enrollment / Teid (Courses1) (2) Write the following query in Relational Algebra. a) Find the sids of students who have enrolled in _course Calculus. b) Find the names of students who have enrolled in course Calculus. c) Find the names of students who have enrolled at least one course. d) Find the names of students who have enrolled in Calculus or Algebra. e) Find the sids of students who have enrolled in all courses (both Courses1 and Courses2).
Consider the relations Courses1, Courses2, Enrollment and Students. Courses cid ename Al Calculus A2 Algebra Location LI L2 A5 English L3 Student(sid, sname, age, level) Courses2 cid Classroom A5 L3 Bl L4 B2 Computing LS name English History b) Courses 1-Courses2 (1) Give the results of the following relational algebra expressions: a) Teid ( name="History' OR 'Computing (Courses2)) c) Courses Courses2 d) Courses1 Enrollment Enrollment sid cid 101 Al 102 A5 103 BI 102 A1 102 A2 e) Enrollment / Teid (Courses1) (2) Write the following query in Relational Algebra. a) Find the sids of students who have enrolled in _course Calculus. b) Find the names of students who have enrolled in course Calculus. c) Find the names of students who have enrolled at least one course. d) Find the names of students who have enrolled in Calculus or Algebra. e) Find the sids of students who have enrolled in all courses (both Courses1 and Courses2).
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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