2853 search results - page 116 / 571 » On the Efficiency of Provenance Queries |
272
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ICDE
2001
IEEE
16 years 7 months ago
2001
IEEE
Due to the ubiquity and popularity of XML, users often are in the following situation: they want to query XML documents which contain potentially interesting information but they ...
290
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ICDT
2009
ACM
16 years 7 months ago
2009
ACM
The class of unions of conjunctive queries (UCQ) has been shown to be particularly well-behaved for data exchange; its certain answers can be computed in polynomial time (in terms...
251
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SIGMOD
2005
ACM
16 years 6 months ago
2005
ACM
This paper introduces RankSQL, a system that provides a systematic and principled framework to support efficient evaluations of ranking (top-k) queries in relational database syst...
155
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WWW
2004
ACM
16 years 7 months ago
2004
ACM
We propose a new distributed, fault-tolerant Peer-to-Peer index structure for resource discovery applications called the P-tree. P-trees efficiently support range queries in addit...
266
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ICDE
2007
IEEE
16 years 7 months ago
2007
IEEE
Text documents often embed data that is structured in nature. By processing a text database with information extraction systems, we can define a variety of structured "relati...