62 search results - page 8 / 13 » Containment of Conjunctive Queries over Databases with Null ... |
ICDT
2003
ACM
14 years 5 days ago
2003
ACM
Abstract. Repairing a database means bringing the database in accordance with a given set of integrity constraints by applying modifications that are as small as possible. In the ...
IDEAS
2008
IEEE
14 years 1 months ago
2008
IEEE
Data stored in a data warehouse are inherently multidimensional, but most data-pruning techniques (such as iceberg and top-k queries) are unidimensional. However, analysts need to...
BTW
2007
Springer
13 years 11 months ago
2007
Springer
Abstract: Content based multimedia retrieval is an important topic in database systems. An emerging and challenging topic in this area is the content based search in video data. A ...
PODS
2004
ACM
14 years 7 months ago
2004
ACM
We study the problem of answering queries over sources with limited access patterns. Given a first-order query Q, the problem is to decide whether there is an equivalent query whi...
ICDE
2010
IEEE
14 years 6 months ago
2010
IEEE
Abstract-- This paper introduces a deterministic approximation algorithm with error guarantees for computing the probability of propositional formulas over discrete random variable...