750 search results - page 37 / 150 » Aggregates in Possibilistic Databases |
EDBT
2002
ACM
14 years 10 months ago
2002
ACM
Abstract. Aggregate window queries return summarized information about objects that fall inside a query rectangle (e.g., the number of objects instead of their concrete ids). Tradi...
ICDT
2005
ACM
14 years 3 months ago
2005
ACM
d abstract) Foto Afrati1 and Rada Chirkova2 1 Electrical and Computing Eng., National Technical University of Athens, 157 73 Athens, Greece 2 Computer Science Department, North Car...
DOLAP
2004
ACM
14 years 3 months ago
2004
ACM
Nowadays, decision support systems are evolving in order to handle complex data. Some recent works have shown the interest of combining on-line analysis processing (OLAP) and data...
DOLAP
2000
ACM
14 years 2 months ago
2000
ACM
We consider the view maintenance problem in a web-based environment, in which clients query information from databases, stored in the form of materialized data warehouses, without...
SAC
2008
ACM
13 years 9 months ago
2008
ACM
We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language t...