525 search results - page 75 / 105 » On Query Algebras for Probabilistic Databases |
DEXA
2010
Springer
15 years 21 days ago
2010
Springer
Significant research efforts have recently been dedicated to modeling and querying uncertain data. In this paper, we focus on skyline analysis of uncertain data, modeled as uncert...
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VLDB
1987
ACM
15 years 3 months ago
1987
ACM
is at least ae powerful as SQL. Two well known relational query languages that have a sound theoretical foundation are relational algebra and relational calculus. As SQL is more cl...
DASFAA
2009
IEEE
15 years 6 months ago
2009
IEEE
Abstract. Extensions of relational databases which aim at utilizing various aspects of similarity and imprecision in data processing are widespread in the literature. A need for de...
DEXA
2000
Springer
15 years 3 months ago
2000
Springer
The relational model, as proposed by Codd, contained the concept of relations as tables composed of tuples of single valued attributes taken from a domain. In most of the early lit...
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PODS
2008
ACM
15 years 11 months ago
2008
ACM
We present a formal framework for capturing the provenance of data appearing in XQuery views of XML. Building on previous work on relations and their (positive) query languages, w...