Consider the relations Courses1, Courses2,_Enrollmentand Students.Coursescid enameAl CalculusA2 AlgebraA5 EnglishLocationLIL2L3Student(sid, sname, age, level)Courses2cidASB1B2nameEnglishHistoryb) Courses 1-Courses2L3L4Computing L5c) Courses Courses2Classroom(1) Give the results of the following relational_algebra expressions:a) Teid ( name='History' OR 'Computing (Courses2))d) Courses1 Enrollmente) Enrollment / Teid (Courses1)Enrollmentsid cid101 Al102 A5103 Bl102 Al102A2CARENA(2) Write the following query in Relational Algebra.a) Find the sids of students who have enrolled incourse 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.

Consider the relations Courses1, Courses2, Enrollment and Students. Courses cid ename Al Calculus LI A2 Algebra L2 A5 English 13 Courses2 Location cid Student(sid, sname, age, level) name Classroom AS English L3 B1 History L4 B2 Computing L5 Enrollment sid cid 101 A1 102 A5 103 BI 102 A1 102 A2 (1) Give the results of the following relational algebra expressions: a) Teid ( name='History' OR 'Computing (Courses2)) b) Courses1-Courses2

Consider the relations Courses1, Courses2, Enrollment and Students. Courses cid ename Al Calculus LI A2 Algebra L2 A5 English 13 Courses2 Location cid Student(sid, sname, age, level) name Classroom AS English L3 B1 History L4 B2 Computing L5 Enrollment sid cid 101 A1 102 A5 103 BI 102 A1 102 A2 (1) Give the results of the following relational algebra expressions: a) Teid ( name='History' OR 'Computing (Courses2)) b) Courses1-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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Consider the relations Courses1, Courses2, _Enrollment and Students. Coursesl cid ename Al Calculus Location L1 A2 Algebra L2 A5 English L3 Student(sid, sname, age, level) Courses2 cid A5 B1 B2 b) Courses 1-Courses2 name English L3 History 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 / Teid (Courses1) Enrollment sid cid 101 Al 102 A5 103 Bl 102 Al 102 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. Courses cid cname 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 (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 / Teid (Courses1) Enrollment sid cid 101 Al 102 A5 103 B1 102 102 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).
For each of the following pairs of expressions, give instances of relations thatshow the expressions are not equivalent. ΠA(r − s) and ΠA(r) − ΠA(s).
Store the following fields for a library database: AuthorCode, AuthorName, BookTitle, BorrowerAddress, BorrowerName, BorrowerCardNumber, CopiesOfBook, ISBN (International Standard Book Number), LoanDate, PublisherCode, PublisherName, and PublisherAddress. A one-to-many relationship exists between publishers and books. Many-to-many relationships exist between authors and books and between borrowers and books.a. Name the entities for the library database b. Without creating a set of dependency diagrams, write the relational schema that meet 3rd NF requirements. c. Draw the Crow’s Food entity-relationship diagram for the library database.
Consider the relations Courses1, Courses2, Enrollment and Students. Courses1 Courses2 Enrollment cid cname Location cid name Classroom sid cid Al Calculus A2 Algebra A5 English English History Computing LI A5 L3 101 Al L2 B1 L4 102 |A5 L3 B2 L5 103 B1 102 A1 102 A2 Student(sid, _sname, age, level) (1) Give the results of the following relational _algebra expressions: a) Tcid (o name ="History' OR 'Computing"(Courses2)) b) Courses1-Courses2 c) Courses1Courses2 d) Courses1 Enrollment e) Enrollment / Tcid (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 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).
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 (G name="History' OR 'Computing (Courses2)) c) Courses lCourses2 Classroom d) Courses1 Enrollment e) Enrollment / cid (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).
The following functional dependencies describe a relation that is in 3NF.Book_ID -> Genre_ID, Genre_TypeGenre_ID -> Genre_Type True or False? Thanks.
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 (G 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).
Consider the relations Courses1, Courses2, _Enrollment and Students. Courses1 Location cid ename 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).
A) The following relations kind a part of a on-line database (the relations area unit self- explanatory): CUSTOMER/CLIENT/SHOPPERS/BUYERS(Cust#, CAddress, Ctown, Balance, Cname) ORDER(Order.# Date, Cust#.) ORDERLINE(Order#, Part#, Amount-Ordered) PART(Part#., Desc, Stock, Item-Class, Unit -Price) a. Design a physical ER for the above scenario. b. With respect to this relative schema, write SQL statements for the subsequent queries: 1. List the name of the client United Nations agency has placed Order 123 (i.e. Order: = 123). 2. List the names of shoppers United Nations agency in Cardiff and have ordered half 456 (i.e. Part. 456). 3. List the order numbers (Order) for orders that contain a minimum of three elements and also the quantity ordered are minimum of ten. 4. List the outline (Desc), of these elements that the typical quantity ordered is bigger than the number ordered for half .6 (Part. = 456) so as 123.(Order..123).
Consider the relations Courses1, Courses2, Enrollment and Students. Courses1 Courses2 Enrollment sid cid cid ename Al Calculus A2 Algebra AS English Location cid name Classroom English History B2 LI L3 101 Al L2 L3 BI L4 102 A5 Computing L5 103 BI 102 Al 102 A2 Student(sid, sname, age, level) (1) Give the results of the following relational _algebra expressions: a) Ttcid (o name ="History' OR 'Computing (Courses2)) b) Courses 1-Courses2 c) CourseslnCourses2 d) Courses1 AEnrollment e) Enrollment / Tcid (Courses l) (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. Le) Find the sids of students who have enrolled in all courses (both Courses1 and Courses2).