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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