654 search results - page 102 / 131 » Complexity of Answering Queries Using Materialized Views |
SIGMOD
2008
ACM
14 years 11 months ago
2008
ACM
To deal with data uncertainty, existing probabilistic database systems augment tuples with attribute-level or tuple-level probability values, which are loaded into the database al...
ASUNAM
2010
IEEE
14 years 11 days ago
2010
IEEE
Subgraph matching is a key operation on graph data. Social network (SN) providers may want to find all subgraphs within their social network that "match" certain query gr...
APCCM
2009
13 years 12 months ago
2009
Using traditional semantic data modeling, multi-level modeling can be achieved by representing objects in different abstraction hierarchies, namely classification, aggregation and...
ICDE
2001
IEEE
15 years 6 days ago
2001
IEEE
We propose an extension to current view-based mediator systems called model-based mediation, in which views are defined and executed at the level of conceptual models (CMs) rather...
MM
2005
ACM
14 years 4 months ago
2005
ACM
The authors developed an extensible system for video exploitation that puts the user in control to better accommodate novel situations and source material. Visually dense displays...