620 search results - page 19 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
117
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DBPL
2009
Springer
15 years 9 months ago
2009
Springer
In this paper, we revisit the view based security framework for XML without imposing any of the previously considered restrictions on the class of queries, the class of DTDs, and t...
230
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GIS
2004
ACM
16 years 3 months ago
2004
ACM
Sensor networks are unattended deeply distributed systems whose schema can be conceptualized using the relational model. Aggregation queries on the data sampled at each ode are th...
154
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JAPLL
2010
15 years 1 months ago
2010
Answering queries over an incomplete database w.r.t. a set of constraints is an important computational task with applications in fields as diverse as information integration and ...
110
Voted
DCOSS
2008
Springer
15 years 4 months ago
2008
Springer
Sensor networks can be viewed as large distributed databases, and SQL-like high-level declarative languages can be used for data and information retrieval. Energy constraints make ...
127
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VLDB
2004
ACM
15 years 8 months ago
2004
ACM
Oracle XML DB integrates XML storage and querying using the Oracle relational and object relational framework. It has the capability to physically store XML documents by shredding...