485 search results - page 43 / 97 » Processing complex aggregate queries over data streams |
126
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PVLDB
2008
15 years 2 months ago
2008
Summaries of massive data sets support approximate query processing over the original data. A basic aggregate over a set of records is the weight of subpopulations specified as a ...
237
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ICDE
2006
IEEE
16 years 4 months ago
2006
IEEE
In this paper, we investigate a new approach to process queries in data stream applications. We show that reference locality characteristics of data streams could be exploited in ...
152
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CIKM
2011
Springer
14 years 3 months ago
2011
Springer
A continuous top-k query retrieves the k most preferred objects in a data stream according to a given preference function. These queries are important for a broad spectrum of appl...
118
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DEBS
2007
ACM
15 years 7 months ago
2007
ACM
Queries for composite events typically involve the four complementary dimensions of event data, event composition, relationships between events (esp. temporal and causal), and acc...
216
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VLDB
2007
ACM
16 years 3 months ago
2007
ACM
As more sensitive data is captured in electronic form, security becomes more and more important. Data encryption is the main technique for achieving security. While in the past en...