265 search results - page 27 / 53 » Tree-width and functional dependencies in databases |
PODS
2006
ACM
14 years 7 months ago
2006
ACM
We propose a novel approach to the classical view update problem. The view update problem arises from the fact that modifications to a database view may not correspond uniquely to...
DLOG
2008
13 years 10 months ago
2008
A fundamental requirement for cooperating agents is to agree on a selection of component values of objects that can be used for reliably communicating references to the objects, to...
19
Voted
IDEAS
2000
IEEE
14 years 1 days ago
2000
IEEE
We present SECONDO, a new generic environment supporting the implementation of database systems for a wide range of data models and query languages. On the one hand, this framewor...
GIS
2008
ACM
14 years 8 months ago
2008
ACM
In this paper, we follow the role-based access control (RBAC) approach and extend it to provide for the dynamic association of roles with users. In our framework, privileges assoc...
EDBT
2008
ACM
14 years 7 months ago
2008
ACM
In this paper we study the problem of mining all frequent queries in a given database table, a problem known to be intractable even for conjunctive queries. We restrict our attent...