1. Consider the following tables and their structures, which are part of a common database: CUSTOMER (CustomerID, CompanyName) SOFTWARE (SoftwareID, SoftwareName, Operating System, Description) LICENCE (LicenceID, Customer ID, SoftwareID, DateOfPurchase, LicenceType, Cost, Expiry Date) (a) Identify the keys (primary keys, alternate keys, foreign keys) from each of the tables. (b) Write a query to display all software for the operating system "Linux" from the table Software. (c) Write a query to list all the licences where cost is more than 35000. Group the output by Ir

1. Consider the following tables and their structures, which are part of a common database: CUSTOMER (CustomerID, CompanyName) SOFTWARE (SoftwareID, SoftwareName, Operating System, Description) LICENCE (LicenceID, Customer ID, SoftwareID, DateOfPurchase, LicenceType, Cost, Expiry Date) (a) Identify the keys (primary keys, alternate keys, foreign keys) from each of the tables. (b) Write a query to display all software for the operating system "Linux" from the table Software. (c) Write a query to list all the licences where cost is more than 35000. Group the output by Ir

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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