# Current database

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Current_database
> Markdown URL: https://mediated.wiki/source/Current_database.md
> Source: https://en.wikipedia.org/wiki/Current_database
> Source revision: 1355647477
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{more citations needed|date=March 2016}}

A '''current database''' is a conventional [database](/source/database) that stores valid [data](/source/data). 

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](/source/temporal_database) qualifies each row with a valid [time ''stamp''](/source/Timestamp), 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.{{citation needed|date=March 2023}} The concept of ''now'' is discussed in Clifford [et alia](/source/et_alia) (1997).<ref>{{cite book |last=Karagiannis |first=Dimitris |date=1994-08-24 |title=Database and Expert Systems Applications: 5th International Conference, DEXA'94, Athens, Greece, September 7 - 9, 1994. Proceedings |publisher=Springer Science & Business Media |isbn=978-3-540-58435-3 |url=https://books.google.com/books?id=0eIyGy4dU1YC&q=current+database+is+a+conventional+database&pg=PA259}}</ref>

==References==
{{Reflist}}

==External links==
*{{cite journal |last1=Clifford |first1=J. |last2=Dyreson |first2=C. |last3=Isakowitz |first3=T. |last4=Jensen |first4=C. S. |last5=Snodgrass |first5=R. T. |year=1997 |title=On the semantics of 'now' in databases |journal=ACM Transactions on Database Systems |doi=10.1145/249978.249980 |citeseerx=10.1.1.112.7301 |s2cid=1879036 |volume=22 |issue=2}}

Category:Types of databases

---
Adapted from the Wikipedia article [Current database](https://en.wikipedia.org/wiki/Current_database) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Current_database?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.