486 search results - page 41 / 98 » Evaluating Top-k Queries over Web-Accessible Databases |
106
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EDBT
2008
ACM
16 years 1 months ago
2008
ACM
This paper studies the problem of evaluating continuous multi-way joins on top of Distributed Hash Tables (DHTs). We present a novel algorithm, called recursive join (RJoin), that...
106
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SIGMOD
1999
ACM
15 years 5 months ago
1999
ACM
A major bottleneck in implementing sampling as a primitive relational operation is the ine ciency ofsampling the output of a query. It is not even known whether it is possible to ...
107
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CIKM
2007
Springer
15 years 7 months ago
2007
Springer
With increasing amount of data being stored in XML format, OLAP queries over these data become important. OLAP queries have been well studied in the relational database systems. H...
151
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ICDE
2012
IEEE
13 years 4 months ago
2012
IEEE
— Accurate query performance prediction (QPP) is central to effective resource management, query optimization and query scheduling. Analytical cost models, used in current genera...
VLDB
2001
ACM
15 years 6 months ago
2001
ACM
We are interested in de ning and querying views in a huge and highly heterogeneous XML repository Web scale . In this context, view de nitions are very large and there is no appa...