485 search results - page 27 / 97 » Processing complex aggregate queries over data streams |
190
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ICDE
2004
IEEE
16 years 1 months ago
2004
IEEE
We examine the problem of evaluating selection queries over imprecisely represented objects. Such objects are used either because they are much smaller in size than the precise on...
187
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VLDB
2007
ACM
16 years 21 days ago
2007
ACM
As computer systems are essential components of many critical commercial services, the need for secure online transactions is now becoming evident. The demand for such application...
100
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ASIAN
2005
Springer
15 years 2 months ago
2005
Springer
Abstract. Detecting changes in data streams is very important for many applications. This paper presents a hybrid method for detecting data stream changes in intensive care unit. I...
206
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SIGMOD
2005
ACM
16 years 19 days 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...
112
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ADBIS
2009
Springer
15 years 7 months ago
2009
Springer
Continuous queries applied over nonterminating data streams usually specify windows in order to obtain an evolving –yet restricted– set of tuples and thus provide timely result...