485 search results - page 84 / 97 » Processing complex aggregate queries over data streams |
CIKM
1999
Springer
15 years 4 months ago
1999
Springer
On-line analytical processing (OLAP) requires e cient processing of complex decision support queries over very large databases. It is well accepted that pre-computed data cubes ca...
186
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SIGMOD
2008
ACM
16 years 18 days ago
2008
ACM
Scientific workflow systems are increasingly used to automate complex data analyses, largely due to their benefits over traditional approaches for workflow design, optimization, a...
PODS
2010
ACM
15 years 5 months ago
2010
ACM
We give the first optimal algorithm for estimating the number of distinct elements in a data stream, closing a long line of theoretical research on this problem begun by Flajolet...
91
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ESWS
2010
Springer
15 years 5 months ago
2010
Springer
Now motivated also by the partial support of major search engines, hundreds of millions of documents are being published on the web embedding semi-structured data in RDF, RDFa and ...
102
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EDBT
2010
ACM
15 years 7 months ago
2010
ACM
This paper addresses a fundamental and challenging problem with broad applications: efficient processing of region-based promotion queries, i.e., to discover the top-k most inter...