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ICDT
2009
ACM
108views Database» more  ICDT 2009»
15 years 10 months ago
A compositional query algebra for second-order logic and uncertain databases
World-set algebra is a variable-free query language for uncertain databases. It constitutes the core of the query language implemented in MayBMS, an uncertain database system. Thi...
Christoph Koch
SIGMOD
2008
ACM
101views Database» more  SIGMOD 2008»
15 years 10 months ago
On Query Algebras for Probabilistic Databases
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...
Christoph Koch
ADC
2004
Springer
87views Database» more  ADC 2004»
15 years 3 months ago
On the Computation of Approximations of Database Queries
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 ...
Flavio Antonio Ferrarotti, Jose Maria Turull Torre...
ENGL
2007
78views more  ENGL 2007»
14 years 10 months ago
A Method for Secure Query Processing in Mobile Databases
—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...
D. Saha, N. Chowdhury
ADBIS
2009
Springer
135views Database» more  ADBIS 2009»
14 years 7 months ago
Systematic Exploration of Efficient Query Plans for Automated Database Restructuring
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 ...
Maxim Kormilitsin, Rada Chirkova, Yahya Fathi, Mat...