7607 search results - page 93 / 1522 » Querying data provenance |
PODS
1993
ACM
15 years 4 months ago
1993
ACM
In this paper, we motivate four di erent user de ned window query classes and derive a probabilistic model for each of them. For each model, we characterize the e ciency of spatia...
108
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VLDB
2005
ACM
15 years 5 months ago
2005
ACM
Query optimizers in current database systems are designed to pick a single efficient plan for a given query based on current statistical properties of the data. However, different...
77
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VLDB
1999
ACM
15 years 4 months ago
1999
ACM
While the desire to support fast, ad hoc query processing for large data warehouses has motivated the
115
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SECON
2008
IEEE
15 years 6 months ago
2008
IEEE
Sensor networks will shortly consist of globally deployed sensors providing real-time geo-centric information to users. Particularly, users with mobile devices will issue ad-hoc q...
109
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INFOSCALE
2007
ACM
15 years 1 months ago
2007
ACM
Efficient multi-dimensional data search has received much attention in centralized systems. However, its implementation in large-scale distributed systems is not a trivial job and...