7576 search results - page 164 / 1516 » On Querying Ontologies and Databases |
216
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SIGMOD
2008
ACM
16 years 6 months ago
2008
ACM
This article proposes a core query algebra for probabilistic databases. In essence, this core is part of the query languages of most probabilistic database systems proposed so far...
137
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ADC
2004
Springer
15 years 11 months ago
2004
Springer
Reflective Relational Machines were introduced by S. Abiteboul, C. Papadimitriou and V. Vianu in 1994, as variations of Turing machines which are suitable for the computation of ...
161
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ENGL
2007
15 years 6 months ago
2007
—A method for secure query processing in mobile databases has been presented in this paper. Mobile devices send queries to the server via point-to-point channels. The mobile data...
162
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ADBIS
2009
Springer
15 years 4 months ago
2009
Springer
We consider the problem of selecting views and indexes that minimize the evaluation costs of the important queries under an upper bound on the disk space available for storing the ...
169
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ICDE
2011
IEEE
14 years 10 months ago
2011
IEEE
— SQL is a classical and powerful tool for querying relational databases. However, it is rather hard for inexperienced users to pose SQL queries, as they are required to be proï¬...