995 search results - page 89 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
113
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GECCO
2007
Springer
15 years 9 months ago
2007
Springer
Genetic algorithms (GAs) have long been used for large join query optimization (LJQO). Previous work takes all queries as based on one granularity to optimize GAs and compares the...
111
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SIGMOD
2004
ACM
16 years 3 months ago
2004
ACM
We present the Priority R-tree, or PR-tree, which is the first R-tree variant that always answers a window query using O((N/B)1-1/d + T/B) I/Os, where N is the number of ddimensio...
144
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DEBU
2008
15 years 3 months ago
2008
In this paper, we describe the TIMBER XML database system implemented at University of Michigan. TIMBER was one of the first native XML database systems, designed from the ground ...
146
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APWEB
2010
Springer
15 years 7 months ago
2010
Springer
Abstract. The term Deep Web (sometimes also called Hidden Web) refers to the data content that is created dynamically as the result of a specific search on the Web. In this respec...
237
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ICDE
2007
IEEE
16 years 4 months ago
2007
IEEE
Linear optimization queries retrieve the top-K tuples in a sliding window of a data stream that maximize/minimize the linearly weighted sums of certain attribute values. To effici...