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 ...
Get Introduction to Database Systems now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
