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A current database is a conventional database that stores data that is valid now.
For example, if a user inserts "John Smith" into the Staff table of a current database, this asserts that the fact is valid now and until it is subsequently deleted. By contrast, a temporal database qualifies each row with a valid time stamp, valid time period or valid time interval. For example, we can assert the fact that "John Smith" was a member of staff during the period 1 June 2001 and now. As of 2006, current databases were the most common type of database in use. The concept of now is discussed in Clifford et alia (1997).
References
- Karagiannis, Dimitris (1994-08-24). Database and Expert Systems Applications: 5th International Conference, DEXA'94, Athens, Greece, September 7 - 9, 1994. Proceedings. Springer Science & Business Media. ISBN 978-3-540-58435-3.
External links
- Clifford, J.; Dyreson, C.; Isakowitz, T.; Jensen, C. S.; Snodgrass, R. T. (1997). "On the semantics of 'now' in databases". ACM Transactions on Database Systems. 22 (2). CiteSeerX 10.1.1.112.7301. doi:10.1145/249978.249980. S2CID 1879036.