373 search results - page 3 / 75 » Querying Priced Information in Databases: The Conjunctive Ca... |
DEXA
1994
Springer
13 years 9 months ago
1994
Springer
Even if high-level query languages are used, query formulation may cause problems. This is notably so in case of large and complex application domains. Typical examples of these ki...
EDBT
2002
ACM
14 years 5 months ago
2002
ACM
The problem of finding contained rewritings of queries using views is of great importance in mediated data integration systems. In this paper, we first present a general approach f...
SIGMOD
2004
ACM
14 years 5 months ago
2004
ACM
We define a framework for static optimization of sliding window conjunctive queries over infinite streams. When computational resources are sufficient, we propose that the goal of...
ER
2008
Springer
13 years 7 months ago
2008
Springer
Access limitations may occur when querying data sources over the web or heterogeneous data sources presented as relational tables: this happens, for instance, in Data Exchange and ...
ICDE
2009
IEEE
14 years 14 days ago
2009
IEEE
— A paramount challenge in probabilistic databases is the scalable computation of confidences of tuples in query results. This paper introduces an efficient secondary-storage o...