486 search results - page 18 / 98 » Evaluating Top-k Queries over Web-Accessible Databases |
DBPL
1999
Springer
15 years 5 months ago
1999
Springer
We consider IES(SQL), the incremental evaluation system over an SQL-like language with grouping, arithmetics, and aggregation. We show that every second order query is in IES(SQL) ...
154
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EDBT
2009
ACM
15 years 4 months ago
2009
ACM
Range queries for querying the current and future positions of the moving objects have received growing interests in the research community. Existing methods, however, assume that...
110
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DASFAA
2010
IEEE
15 years 1 months ago
2010
IEEE
Achieving data security over cooperating web services is becoming a reality, but existing XML access control architectures do not consider this federated service computing. In this...
121
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VLDB
2002
ACM
15 years 1 months ago
2002
ACM
Many valuable text databases on the web have non-crawlable contents that are "hidden" behind search interfaces. Metasearchers are helpful tools for searching over many s...
198
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ICDE
1999
IEEE
16 years 2 months ago
1999
IEEE
We develop a data integration approach for the efficient evaluation of queries over autonomous source databases. The approach is based on some novel applications and extensions of...