November 2008
Intermediate to advanced
592 pages
20h 13m
English
Content preview from Introduction to Database SystemsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Glossary
Access matrix: a table containing the authorization information, which the database system consults each time an access request is issued in the system—the columns of access matrix represent objects and rows represent subjects
Access time: the period of time that elapses between a request for information from disk or memory, and the information arriving at the requesting device
ACID properties: the acronym derived from the first letter of the terms atomicity, consistency, isolation, and durability—the four desirable properties of the transaction
Active database: a database having triggers associated with it
After-image (AFIM): a copy of the data item after modification
Aggregate function: a function that takes a collection of values ...
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