716 search results - page 33 / 144 » Optimizing Queries in Extended Relational Databases |
102
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IS
2007
14 years 11 months ago
2007
Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). Such queries are pa...
175
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VLDB
2002
ACM
15 years 11 months ago
2002
ACM
Relational database systems have traditionally optimized for I/O performance and organized records sequentially on disk pages using the N-ary Storage Model (NSM) (a.k.a., slotted ...
IDEAS
2005
IEEE
15 years 4 months ago
2005
IEEE
The XML data is order-sensitive. The order problem, that is how ordered XML documents and order-sensitive queries over it can be efficiently supported when mapped into the unorde...
114
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CIDR
2011
14 years 2 months ago
2011
For some problems, human assistance is needed in addition to automated (algorithmic) computation. In sharp contrast to existing data management approaches, where human input is ei...
FGCS
2000
14 years 11 months ago
2000
This paper focuses on parallel query optimization. We consider the operator problem and introduce a new class of execution strategies called Linear-Oriented Bushy Trees (LBTs). Co...