6740 search results - page 1182 / 1348 » Querying Databases with Taxonomies |
277
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VLDB
2004
ACM
16 years 6 months ago
2004
ACM
Indatawarehousingapplications,numerousOLAP queries involve the processing of holistic aggregators such as computing the "top n," median, quantiles, etc. In this paper, we...
262
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VLDB
2004
ACM
16 years 6 months ago
2004
ACM
Abstract. In dynamic environments like the Web, data sources may change not only their data but also their schemas, their semantics, and their query capabilities.When a mapping is ...
259
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VLDB
2007
ACM
16 years 6 months ago
2007
ACM
Estimating the cardinality (i.e. number of distinct elements) of an arbitrary set expression defined over multiple distributed streams is one of the most fundamental queries of in...
279
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VLDB
2007
ACM
16 years 6 months ago
2007
ACM
We present STAR, a self-tuning algorithm that adaptively sets numeric precision constraints to accurately and efficiently answer continuous aggregate queries over distributed data...
254
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VLDB
2007
ACM
16 years 6 months ago
2007
ACM
In this paper we argue that developing information extraction (IE) programs using Datalog with embedded procedural extraction predicates is a good way to proceed. First, compared ...