620 search results - page 25 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
130
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SIGMOD
2010
ACM
15 years 7 months ago
2010
ACM
In this paper, we propose an online aggregation system called COSMOS (Continuous Sampling for Multiple queries in an Online aggregation System), to process multiple aggregate quer...
151
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WWW
2008
ACM
16 years 3 months ago
2008
ACM
The web has become an important medium for news delivery and consumption. Fresh content about a variety of topics, events, and places is constantly being created and published on ...
126
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CP
1999
Springer
15 years 7 months ago
1999
Springer
Reformulating constraint satisfaction problems (CSPs) in lower arity is a common procedure when computing consistency. Lower arity CSPs are simpler to treat than high arity CSPs. ...
120
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CIKM
2009
Springer
15 years 7 months ago
2009
Springer
Answering queries using views is a well-established technique in databases. In this context, two outstanding problems can be formulated. The first one consists in deciding whethe...
119
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SAC
2008
ACM
15 years 2 months ago
2008
ACM
We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language t...