620 search results - page 57 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
131
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ADBIS
2006
Springer
15 years 10 months ago
2006
Springer
materialized view selection is a non-trivial task. Hence, its complexity must be reduced. A judicious choice of views must be costdriven and influenced by the workload experienced...
131
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ATAL
2009
Springer
15 years 10 months ago
2009
Springer
Sensor nodes are often used to collect data from locations inaccessible or hazardous for humans. As they are not under normal supervision, these nodes are particularly susceptible...
125
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WWW
2008
ACM
16 years 4 months ago
2008
ACM
In this paper, we propose a new approach to automatically compose data providing Web services. Our approach exploits existing mature works done in data integration systems. Specif...
138
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KDD
2008
ACM
16 years 4 months ago
2008
ACM
We present a prototype of an inductive database. Our system enables the user to query not only the data stored in the database but also generalizations (e.g. rules or trees) over ...
148
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EDBT
2009
ACM
15 years 10 months ago
2009
ACM
Materialized views (MV) can significantly improve the query performance of relational databases. In this paper, we consider MVs to optimize complex scenarios where many heterogen...