2724 search results - page 72 / 545 » Optimizing Queries on Files |
125
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CDB
2004
Springer
15 years 7 months ago
2004
Springer
Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). We present here a nu...
106
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VLDB
1992
ACM
15 years 5 months ago
1992
ACM
In this paper, we discuss issues involving temporal data fragmentation, temporal query processing, and query optimization in multiprocessor database machines. We propose parallel ...
AAAI
1997
15 years 2 months ago
1997
We consider the problem of query plan optimization in information brokers. Information brokers are programs that facilitate access to collections of information sources by hiding ...
113
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LATIN
2010
Springer
15 years 8 months ago
2010
Springer
For a static array A of n totally ordered objects, a range minimum query asks for the position of the minimum between two specified array indices. We show how to preprocess A into...
119
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KRDB
2003
15 years 2 months ago
2003
Motivated by the possibilities of applying deductive database technology for efficient query answering in description logics, we present a translation operator µ that transforms...