Current database
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.
Current databases are the most common type of database in use today. The concept of now is discussed in Clifford et alia (1997).
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): 171. doi:10.1145/249978.249980.
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