525 search results - page 12 / 105 » On Query Algebras for Probabilistic Databases |
PODS
2010
ACM
14 years 14 days ago
2010
ACM
We investigate a higher-order query language that embeds operators of the positive relational algebra within the simply-typed λ-calculus. Our language allows one to succinctly de...
ICDE
1998
IEEE
14 years 8 months ago
1998
IEEE
Algebraic transformation and optimization techniques have been the method of choice in relational query execution, but applying them in OODBMS is difficult due to the complexity o...
VLDB
1990
ACM
13 years 11 months ago
1990
ACM
A probabilistic learning model for vague queries and missing or imprecise information in databases is described. Instead of retrieving only a set of answers, our approach yields a...
EDBTW
2006
Springer
13 years 9 months ago
2006
Springer
Abstract. Relational algebra has been a crucial foundation for relational database systems, and has played a large role in enabling their success. A corresponding XML algebra for X...
ICCSA
2007
Springer
14 years 1 months ago
2007
Springer
Abstract. Relational algebra is one of the main topics covered in undergraduate computer science database courses. In this paper, we present a web-based tool designed to automatica...