708 search results - page 46 / 142 » A Genetic Algorithm for Database Query Optimization |
172
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JAPLL
2010
15 years 2 months ago
2010
Answering queries over an incomplete database w.r.t. a set of constraints is an important computational task with applications in fields as diverse as information integration and ...
277
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ICDE
2008
IEEE
16 years 5 months ago
2008
IEEE
In this paper we explore database segmentation in the context of a column-store DBMS targeted at a scientific database. We present a novel hardware- and scheme-oblivious segmentati...
165
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SIGMOD
1993
ACM
15 years 8 months ago
1993
ACM
We describe the design and implementation of the Glue-Nail database system. The Nail language is a purely declarative query language; Glue is a procedural language used for nonque...
128
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PODS
2010
ACM
15 years 9 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...
129
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PODS
2006
ACM
16 years 4 months ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...