Answer:
Follows are the matching to this question:
Explanation:
While time-consuming or prone to errors mechanical adjustments to both the referential, databases could be configured with four measures to engine violations. The restricted action causes the insert, update, and removes to only be denied. Set Null to NULL sets the invalid external key, whereas Set Default to a specific core consideration specified in SQL sets a default foreign key. Its Cascade operation spreads the main changes in external keys.
B
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Productivity programs improved the professional lives of people because:
- made it easier and faster to communicate with others
- made it easier to manipulate numbers in a spreadsheet
- made it easier and less expensive to present information
<h3>What is productivity?</h3>
Productivity is known to be the level of efficiency in regards to the production of goods or services and it is one that is rated by some measure.
Hence, Productivity programs improved the professional lives of people because:
- made it easier and faster to communicate with others
- made it easier to manipulate numbers in a spreadsheet
- made it easier and less expensive to present information
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The file that contains full and incremental back-up information for use with the dump/restore utility is <u>/etc/dumpdates.</u>
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<h3>What is dump/restore utility ?</h3>
Dump examines files in a filesystem, determines which ones need to be backed up, and copies those files to a specified disk, tape or other storage medium. Subsequent incremental backups can then be layered on top of the full backup.
The restore command performs the inverse function of dump; it can restore a full backup of a filesystem. Single files and directory subtrees may also be restored from full or partial backups in interactive mode.
Learn more about incremental backups
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