427 search results - page 13 / 86 » Conjunctive Query Answering in EL using a Database System |
ICDT
2003
ACM
14 years 1 months ago
2003
ACM
In an on-line statistical database, the query system should leave unanswered queries asking for sums that could lead to the disclosure of confidential data. To check that, every su...
FOIKS
2004
Springer
14 years 2 months ago
2004
Springer
Abstract. We give a general framework for approximate query processing in semistructured databases. We focus on regular path queries, which are the integral part of most of the que...
FQAS
2006
Springer
14 years 12 days ago
2006
Springer
Consistent query answering is the term commonly used for the problem of answering queries on databases that violate certain integrity constraints. We address this problem for univ...
ICDE
2012
IEEE
11 years 11 months ago
2012
IEEE
— Uncertainties in data arise for a number of reasons: when the data set is incomplete, contains conflicting information or has been deliberately perturbed or coarsened to remov...
ICDT
2012
ACM
11 years 11 months ago
2012
ACM
A universal model of a database D and a set Σ of integrity constraints is a database that extends D, satisfies Σ, and is most general in the sense that it contains sound and co...