Consider the relations Courses1, Courses2, Enrollment and Students. Courses cid ename Al Calculus Location cid LI A2 Algebra L2 A5 English 13 Courses2 Student(sid, sname, age, level) name A5 English BI History B2 Classroom L3 L4 Computing L5 b) Courses 1-Courses2 (1) Give the results of the following relational algebra expressions: a) Acid ( name='History' OR 'Computing (Courses2)) c) Courses Courses2 Enrollment sid cid 101 A1 102 A5 103 Bl 102 Al 102 A2 d) Courses1 Enrollment
Consider the relations Courses1, Courses2, Enrollment and Students. Courses cid ename Al Calculus Location cid LI A2 Algebra L2 A5 English 13 Courses2 Student(sid, sname, age, level) name A5 English BI History B2 Classroom L3 L4 Computing L5 b) Courses 1-Courses2 (1) Give the results of the following relational algebra expressions: a) Acid ( name='History' OR 'Computing (Courses2)) c) Courses Courses2 Enrollment sid cid 101 A1 102 A5 103 Bl 102 Al 102 A2 d) Courses1 Enrollment
Principles of Information Systems (MindTap Course List)
12th Edition
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Ralph Stair, George Reynolds
Chapter5: Database Systems And Applications
Section: Chapter Questions
Problem 4PSE: Using a graphics program, develop an entity-relationship diagram for a database application for an...
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Question
![Consider the relations Courses1, Courses2,
_Enrollment
and Students.
Courses
cid ename
Al Calculus
A2 Algebra
A5 English
Location
LI
L2
L3
Student(sid, sname, age, level)
Courses2
cid
AS
B1
B2
name
English
History
b) Courses 1-Courses2
L3
L4
Computing L5
(1) Give the results of the following relational
_algebra expressions:
a) Teid ( name='History' OR 'Computing (Courses2))
c) Courses Courses2
Classroom
d) Courses1 Enrollment
e) Enrollment / Tid (Courses1)
Enrollment
sid cid
101 Al
102 A5
103 Bl
102 Al
102
A2
CARENA
(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).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fae6c0e00-477d-48fe-8474-bbac04ac2a22%2F088396e9-8a3a-443a-8306-18484a50a375%2Fughtc2u_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Consider the relations Courses1, Courses2,
_Enrollment
and Students.
Courses
cid ename
Al Calculus
A2 Algebra
A5 English
Location
LI
L2
L3
Student(sid, sname, age, level)
Courses2
cid
AS
B1
B2
name
English
History
b) Courses 1-Courses2
L3
L4
Computing L5
(1) Give the results of the following relational
_algebra expressions:
a) Teid ( name='History' OR 'Computing (Courses2))
c) Courses Courses2
Classroom
d) Courses1 Enrollment
e) Enrollment / Tid (Courses1)
Enrollment
sid cid
101 Al
102 A5
103 Bl
102 Al
102
A2
CARENA
(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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