DBA
2004
13 years 9 months ago
2004
We argue for a new aggregate function we termed the LIST function. It aggregates a set of values of one or more attributes into a single value that is internally a list of these v...
DBA
2004
13 years 9 months ago
2004
In the conventional Peer-to-Peer (P2P) networks, many research projects or practical applications still use the keyword-based retrieval methods in the information searching compon...
DBA
2004
13 years 9 months ago
2004
In order to guarantee efficient query processing together with industrial strength, spatial index structures have to be integrated into fully-fledged object-relational database ma...
DBA
2004
13 years 9 months ago
2004
DBA
2004
13 years 9 months ago
2004
In this paper we present an authorization mechanism for a relational database. It allows defining the user privileges exact to a table row. To implement that we used the INSTEAD t...
DBA
2004
13 years 9 months ago
2004
This paper discusses how to extend the applicability of the recursive cascade update command of the Xplain query language. This command guarantees termination because cycle detect...
DBA
2004
2004
A Tool for Transforming Conceptual Schemas of Spatio-Temporal Databases with Multiple Representation
13 years 9 months ago
Nowadays, classical conceptual models (such as ER or UML) are used for designing database applications. These classical conceptual models usually come with associated CASE tools a...
SEBD
2007
13 years 9 months ago
2007
In the last few years, we have been witnessing an evergrowing need for continuous observation and monitoring applications. This need is driven by recent technological advances that...
SEBD
2007
13 years 9 months ago
2007
SEBD
2007
13 years 9 months ago
2007
Preference queries aim to retrieve from large databases those objects that better match user’s requirements. Approaches proposed so far in the DB field for specifying preference...