2063 search results - page 175 / 413 » Containment of Aggregate Queries |
139
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VLDB
2002
ACM
15 years 4 months ago
2002
ACM
Traditional indexes aim at optimizing the node accesses during query processing, which, however, does not necessarily minimize the total cost due to the possibly large number of r...
256
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ICDE
2007
IEEE
16 years 6 months ago
2007
IEEE
Most of the existing work on skyline query has been extensively used in decision support, recommending systems etc, and mainly focuses on the efficiency issue for a single table. ...
123
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SIGMOD
2003
ACM
16 years 4 months ago
2003
ACM
We present an update on the status of the Cougar Sensor Database Project, in which we are investigating a database approach to sensor networks: Clients "program" the sen...
133
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CISIS
2008
IEEE
15 years 11 months ago
2008
IEEE
Solving problems raised by heterogeneous ontologies can be achieved by matching the ontologies and processing the resulting alignments. This is typical of data mediation in which ...
132
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ICDE
2007
IEEE
15 years 11 months ago
2007
IEEE
Recently there is much need of discovering useful knowledge from massive log-data which are generated by Webbased information systems. Such log-data have multiple attributes about...