Consider the relations Courses1, Courses2,_Enrollmentand Students.Courses1Locationcid enameAl CalculusLIA2 Algebra L2A5 EnglishL3Student(sid, sname, age, level)Courses2cidA5BIB2nameEnglishHistoryb) Courses 1-Courses2L3L4Computing L5c) Courses1 Courses2Classroomd) Courses 1 Enrollment(1) Give the results of the following relational_algebra expressions:a) Teid ( name='History' OR 'Computing (Courses2))e) Enrollment / Teid (Courses1)EnrollmentcidAlA5sid101102103102102B1AlA2(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 incourse Calculus._c) Find the names of students who have enrolled atleast 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 allcourses (both Courses1 and Courses2).

As per the answering guidelines solving the first 3 sub question completely. 1) Here selection…

Enrollment and Students. Courses cid ename Al Calculus Location LI A2 Algebra L2 A5 English 1.3 Student(sid, sname, age, level) Courses2 cid A5 BI B2 name English History b) Courses 1-Courses2 L3 L4 Computing L5 Classroom (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 A1 102 A5 103 B1 102 A1 102 A2

Enrollment and Students. Courses cid ename Al Calculus Location LI A2 Algebra L2 A5 English 1.3 Student(sid, sname, age, level) Courses2 cid A5 BI B2 name English History b) Courses 1-Courses2 L3 L4 Computing L5 Classroom (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 A1 102 A5 103 B1 102 A1 102 A2

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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