20 search results - page 4 / 4 » Aggregate Query Answering under Uncertain Schema Mappings |
GIS
2004
ACM
14 years 5 months ago
2004
ACM
Sensor networks are unattended deeply distributed systems whose schema can be conceptualized using the relational model. Aggregation queries on the data sampled at each ode are th...
DEXAW
1998
IEEE
13 years 9 months ago
1998
IEEE
Materialized views offer opportunities for significant performance gain in query evaluation by providing fast access to pre-computed data. The question of when and how to use a ma...
SIGMOD
2007
ACM
14 years 4 months ago
2007
ACM
Translating data and data access operations between applications and databases is a longstanding data management problem. We present a novel approach to this problem, in which the...
DBPL
2005
Springer
13 years 10 months ago
2005
Springer
We study peer-to-peer ðP2PÞ data integration, where each peer models an autonomous system that exports data in terms of its own schema, and data interoperation is achieved by me...
DAWAK
2006
Springer
13 years 8 months ago
2006
Springer
Comprehensive data analysis has become indispensable in a variety of environments. Standard OLAP (On-Line Analytical Processing) systems, designed for satisfying the reporting need...