498 search results - page 19 / 100 » A Logical Temporal Relational Data Model |
170
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ICDE
2003
IEEE
16 years 1 months ago
2003
IEEE
We present a valid-time extension of SQL and investigate its efficient implementation on an Object-Relational database system. We propose an approach where temporal queries are ex...
111
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VLDB
2010
ACM
14 years 10 months ago
2010
ACM
According to the database outsourcing model, a data owner delegates database functionality to a thirdparty service provider, which answers queries received from clients. Authentic...
123
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DEXAW
1999
IEEE
15 years 4 months ago
1999
IEEE
Schema versioning provides a mechanism for handling change in the structure of database systems and has been investigated widely, both in the context of static and temporal databa...
TIME
2005
IEEE
15 years 5 months ago
2005
IEEE
This paper presents an XML-based approach to implementing the parametric model of temporal databases. In the parametric model, attribute values are functions of time and the entir...
TIME
2003
IEEE
15 years 5 months ago
2003
IEEE
In bitemporal databases, current facts and transaction states are modelled using a special value to represent the current time (such as a minimum or maximum timestamp or NULL). Pr...