Database System Concepts
7th Edition
ISBN: 9789332901384
Author: Henry F. Korth & S. Sudarshan Abraham Silberschatz
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Expert Solution & Answer
Chapter 2, Problem 17E
Explanation of Solution
Relational query languages:
- The query language is a language is a language in which user requests information from the
database . - The query languages are higher level when compared to the standard
programming languages. - The Query languages can be categorized to three that are, imperative, functional and declarative.
Imperative query language:
- In the imperative query language, the system needs to perform specific sequence of operations on the database to compute the desired result.
- The imperative paradigm is one that the hardware of the computer is based on.
- With enough software the user can implement Object-Oriented programming, functional Programming, and Logical programming in the imperative paradigm...
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Let the user choose encryption or decryption.
For encryption, let user input the key in Hexadecimal number, the plain text in Hexadecimal number, output the ciphertext (in hexadecimal numbers).
For decryption, let user input the key in Hexadecimal number, the ciphertext (in hexadecimal numbers), output the decrypted message (Hexadecimal number).
Both encryption and decryption should output the different operation results for each round like the following:
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