Need only IV and V Consider a relational table:OrderLine(orderNum, lineNum, item, discount, quantity)The primary key of the relational table OrderLine is a composite key consisting of theattributes (orderNum, lineNum), and the primary key is automatically indexed.For each of the select statements specified in (i) to (v) below, find the best possibleindex for the relational table OrderLine that allow a database system to execute theselect statement in a manner described. Write a create index statement to create theindex.ii.SELECT sum(sum(quantity))FROM OrderLineGROUP BY OrderNumHAVING count(LineNum) > 5;Create an index such that the execution of the SELECT statement must traversethe leaf level of the index horizontally and it MUST NOT access the relationaltable OrderLine.iv.SELECT *FROM OrderLineWHERE discount = 0.1;Create an index such that the execution of the SELECT statement must traversethe index vertically and then horizontally and it MUST access the relational tableOrderLine.v.SELECT quantity, discountFROM OrderLineWHERE OrderNum = '0123'AND LineNum = 1AND item = '27 inch monitor';Create an index such that the execution of the SELECT statement must traversethe index vertically and MUST access the relational table OrderLine.

iv. CREATE UNIQUE INDEX In1 ON OrderLine(OrderNum); Explanation: This query is used to create the…

iv. SELECT * FROM OrderLine WHERE discount = 0.1; Create an index such that the execution of the SELECT statement must traverse the index vertically and then horizontally and it MUST access the relational table OrderLine. v. SELECT quantity, discount FROM OrderLine WHERE OrderNum = '0123' AND LineNum - 1 AND item = '27 inch monitor'; Create an index such that the execution of the SELECT statement must traverse the index vertically and MUST access the relational table OrderLine.

iv. SELECT * FROM OrderLine WHERE discount = 0.1; Create an index such that the execution of the SELECT statement must traverse the index vertically and then horizontally and it MUST access the relational table OrderLine. v. SELECT quantity, discount FROM OrderLine WHERE OrderNum = '0123' AND LineNum - 1 AND item = '27 inch monitor'; Create an index such that the execution of the SELECT statement must traverse the index vertically and MUST access the relational table OrderLine.

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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Given the following relation: Book (BookID, Author, ISBN, Title) Write a PL/SQL block of code that performs the following tasks: Read a Book id provided by user at run time and store it in a variable. Fetch the Author and title of the book having the entered id and store them inside two variables Display the fetched book author and title.
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The following tables form part of a Library database held in an RDBMS: Book (ISBN, title, edition, year) BookCopy (copyNo, ISBN, available) Borrower (borrowerNo, borrowerName, borrowerAddress) BookLoan (copyNo, dateOut, dateDue, borrowerNo) where: Book contains details of book titles in the library and the ISBN is the key. BookCopy contains details of the individual copies of books in the library and copyNo is the key. ISBN is a foreign key identifying the book title. Borrower contains details of library members who can borrow books and borrowerNo is the key. BookLoan contains details of the book copies that are borrowed by library members and copyNo/dateOut forms the key. borrowerNo is a foreign key identifying the borrower. Formulate the following queries in relational algebra only. a. How many copies of ISBN “0-321-52306-7” are there? b. How many copies of ISBN “0-321-52306-7” are currently available c. How many times has the book title with ISBN…
Given the following relation: Book (BooklD, Author, ISBN, Title) Write a PL/SQL block of code that performs the following tasks: i. Read a Book id provided by user at run time and store it in a variable. ii. Fetch the Author and title of the book having the entered id and store them inside two variables i. Display the fetched book author and title. T TTF Paragraph Arial 3 (12pt) ABC T T, e HTML CSS O f. Mashups
The following tables form part of a Library database held in an RDBMS: Book (ISBN, title, edition, year) BookCopy (copyNo, ISBN, available) Borrower (borrowerNo, borrowerName, borrowerAddress) BookLoan (copyNo, dateOut, dateDue, borrowerNo) where: Book contains details of book titles in the library and the ISBN is the key. BookCopy contains details of the individual copies of books in the library and copyNo is the key. ISBN is a foreign key identifying the book title. Borrower contains details of library members who can borrow books and borrowerNo is the key. BookLoan contains details of the book copies that are borrowed by library members and copyNo/dateOut forms the key. borrowerNo is a foreign key identifying the borrower. a. List all copies of the book title “Lord of the Rings” that are available for borrowing. b. List the names of borrowers who currently have the book title “Lord of the Rings” on loan. c. List the names of borrowers with overdue books.