2228 search results - page 249 / 446 » A System for Semantic Query Optimization |
122
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SSD
2005
Springer
15 years 8 months ago
2005
Springer
Abstract. Query optimization is an important functionality of modern database systems and often based on estimating the selectivity of queries before actually executing them. Well-...
140
Voted
DASFAA
2004
IEEE
15 years 6 months ago
2004
IEEE
Abstract. The efficient management of interval sequences represents a core requirement for many temporal and spatial database applications. With the Relational Interval Tree (RI-tr...
134
Voted
ER
2008
Springer
15 years 4 months ago
2008
Springer
Access limitations may occur when querying data sources over the web or heterogeneous data sources presented as relational tables: this happens, for instance, in Data Exchange and ...
136
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AUSAI
2004
Springer
15 years 8 months ago
2004
Springer
The PolicyUpdater1 system is a fully-implemented access control system that provides policy evaluations as well as dynamic policy updates. These functions are achieved by the use o...
133
Voted
CORR
2010
Springer
15 years 2 months ago
2010
Springer
Time is one of the most difficult aspects to handle in real world applications such as database systems. Relational database management systems proposed by Codd offer very little ...