549 search results - page 49 / 110 » Data Expiration and Aggregate Queries |
141
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SIGMOD
1997
ACM
15 years 8 months ago
1997
ACM
Data warehouses contain large amounts of information, often collected from a variety of independent sources. Decision-support functions in a warehouse, such as on-line analytical ...
145
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SENSYS
2003
ACM
15 years 9 months ago
2003
ACM
Sensor networks promise viable solutions to many monitoring problems. However, the practical deployment of sensor networks faces many challenges imposed by real-world demands. Sen...
246
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SIGMOD
2005
ACM
16 years 4 months ago
2005
ACM
While traditional database systems optimize for performance on one-shot queries, emerging large-scale monitoring applications require continuous tracking of complex aggregates and...
138
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IPSN
2005
Springer
15 years 10 months ago
2005
Springer
A wireless sensor network consists of a large number of small, resource-constrained devices and usually operates in hostile environments that are prone to link and node failures. ...
234
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ICDE
2006
IEEE
16 years 5 months ago
2006
IEEE
A top-k query combines different rankings of the same set of objects and returns the k objects with the highest combined score according to an aggregate function. We bring to ligh...