EBK DATABASE SYSTEMS: DESIGN, IMPLEMENT
12th Edition
ISBN: 8220101450739
Author: Morris
Publisher: YUZU
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Chapter 10, Problem 5P
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It is the process of restoring a database to a previous consistent state. It reverses the process of transaction from inconsistent state to previous consistent state. The duration of database recovery may vary depending on the type and extent of the failure. The user cannot access the previous data without backup.
The database recovery process has the set of predictable scenario is as follows:
- Determine the type and time estimation for the required recovery.
- The recovery process uses the backup copy of the database that needs to convert the consistent state.
- Transaction log can be used to restore all subsequent transactions.
Techniques that was used in database recovery:
The technique of database recovery used to bringing the database to a consistent state after a failure...
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8. Name and Email AddressesWrite a program that keeps names and email addresses in a dictionary as key-value pairs. The program should display a menu that lets the user look up a person’s email address, add a new name and email address, change an existing email address, and delete an existing name and email address. The program should pickle the dictionary and save it to a file when the user exits the program. Each time the program starts, it should retrieve the dictionary from the file and unpickle it.
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Chapter 10 Solutions
EBK DATABASE SYSTEMS: DESIGN, IMPLEMENT
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