750 search results - page 64 / 150 » Aggregates in Possibilistic Databases |
GIS
2002
ACM
13 years 9 months ago
2002
ACM
The focus of this paper is on interoperability issues to achieve data integration in distributed databases for geographic applications. Our concrete application is in the context ...
APWEB
2004
Springer
14 years 3 months ago
2004
Springer
Queries to data warehouses often involve hundreds of complex aggregations over large volumes of data, and so it is infeasible to compute these queries by scanning the data sources ...
CRIWG
2004
13 years 11 months ago
2004
Awareness is an essential requirement in collaborative activities. This paper presents Ariane, a generic and reusable awareness infrastructure, independent of a specific applicatio...
PODS
2001
ACM
14 years 10 months ago
2001
ACM
A classic result of Johnson and Lindenstrauss asserts that any set of n points in d-dimensional Euclidean space can be embedded into k-dimensional Euclidean space -- where k is lo...
DBPL
1999
Springer
14 years 2 months ago
1999
Springer
We consider IES(SQL), the incremental evaluation system over an SQL-like language with grouping, arithmetics, and aggregation. We show that every second order query is in IES(SQL) ...