492 search results - page 94 / 99 » Computing aggregations in database query languages |
PODC
2006
ACM
14 years 3 months ago
2006
ACM
We study the problem of maintaining sketches of recent elements of a data stream. Motivated by applications involving network data, we consider streams that are asynchronous, in w...
DEBS
2003
ACM
14 years 3 months ago
2003
ACM
We present a design of a distributed publish-subscribe system that extends the functionality of messaging middleware with “relational subscriptions”, to support timely updates...
ICCS
2009
Springer
14 years 4 months ago
2009
Springer
Abstract. In knowledge bases, the open world assumption and the ability to express variables may lead to an answer redundancy problem. This problem occurs when the returned answers...
CORR
2008
Springer
13 years 10 months ago
2008
Springer
Provenance is information about the origin, derivation, ownership, or history of an object. It has recently been studied extensively in scientific databases and other settings due...
BMCBI
2007
13 years 10 months ago
2007
Background: An adequate and expressive ontological representation of biological organisms and their parts requires formal reasoning mechanisms for their relations of physical aggr...