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Consider the relations Courses1, Courses2, _Enrollment and Students. Courses1 cid ename Al Calculus A2 Algebra A5 English Location LI L2 L3 Student(sid, sname, age, level) Courses2 cid A5 Bl B2 name English History b) Courses 1-Courses2 L3 L4 Computing L5 c) Courses Courses2 Classroom d) Courses1 Enrollment (1) Give the results of the following relational algebra expressions: a) Teid ( name='History' OR 'Computing (Courses2)) e) Enrollment / Teid (Courses1) Enrollment sid cid 101 Al A5 102 103 102 102 B1 Al A2 (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. Courses1 cid ename Al Calculus A2 Algebra A5 English Location LI L2 L3 Student(sid, sname, age, level) Courses2 cid A5 Bl B2 name English History b) Courses 1-Courses2 L3 L4 Computing L5 c) Courses Courses2 Classroom d) Courses1 Enrollment (1) Give the results of the following relational algebra expressions: a) Teid ( name='History' OR 'Computing (Courses2)) e) Enrollment / Teid (Courses1) Enrollment sid cid 101 Al A5 102 103 102 102 B1 Al A2 (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).

Computer Networking: A Top-Down Approach (7th Edition)
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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Consider the relations Courses1, Courses2, _Enrollment and Students. Courses1 Location cid cname Al Calculus LI A2 Algebra L2 A5 English L3 Student(sid, sname, age, level) Courses2 cid A5 BI B2 name English History b) Courses 1-Courses2 L3 L4 Computing L5 c) Courses Courses2 Classroom d) Courses1 Enrollment (1) Give the results of the following relational algebra expressions: a) Teid ( name='History' OR 'Computing (Courses2)) e) Enrollment / Teid (Courses1) Enrollment cid Al A5 sid 101 102 103 102 102 B1 Al A2 (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).
Transcribed Image Text:Consider the relations Courses1, Courses2, _Enrollment and Students. Courses1 Location cid cname Al Calculus LI A2 Algebra L2 A5 English L3 Student(sid, sname, age, level) Courses2 cid A5 BI B2 name English History b) Courses 1-Courses2 L3 L4 Computing L5 c) Courses Courses2 Classroom d) Courses1 Enrollment (1) Give the results of the following relational algebra expressions: a) Teid ( name='History' OR 'Computing (Courses2)) e) Enrollment / Teid (Courses1) Enrollment cid Al A5 sid 101 102 103 102 102 B1 Al A2 (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).
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