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1. Consider the following tables and their structures, which are part of a common database: CUSTOMER (Customer ID, Company Name) 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 CustomerID, and in ascending order of cost.

1. Consider the following tables and their structures, which are part of a common database: CUSTOMER (Customer ID, Company Name) 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 CustomerID, and in ascending order of cost.

Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
11th Edition
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Chapter10: Transaction Management And Concurrency Control
Section: Chapter Questions
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1. Consider the following tables and their structures, which are part of a common database: CUSTOMER (CustomerID, Company Name) 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 CustomerID, and in ascending order of cost.
Transcribed Image Text:1. Consider the following tables and their structures, which are part of a common database: CUSTOMER (CustomerID, Company Name) 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 CustomerID, and in ascending order of cost.
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