413 search results - page 33 / 83 » Optimizing Queries Across Diverse Data Sources |
BTW
2005
Springer
15 years 3 months ago
2005
Springer
: Optimizers in modern DBMSs utilize a cost model to choose an efficient query execution plan (QEP) among all possible ones for a given query. The accuracy of the cost estimates de...
130
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EKAW
2010
Springer
14 years 8 months ago
2010
Springer
Linked Data semantic sources, in particular DBpedia, can be used to answer many user queries. PowerAqua is an open multi-ontology Question Answering (QA) system for the Semantic We...
BDA
2007
14 years 11 months ago
2007
Pervasive information systems give an overview of what digital environments should look like in the future. From a data-centric point of view, traditional databases have to be use...
EDBT
2006
ACM
15 years 1 months ago
2006
ACM
As data management applications grow more complex, they may need efficient distributed query processing, but also subscription management, data archival etc. To enact such applicat...
171
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SIGMOD
2006
ACM
15 years 10 months ago
2006
ACM
We present our prototype system, OMCAT, which optimizes the reevaluation of a set of pending continuous spatio-temporal queries on trajectory data, when some of the trajectories a...