36 search results - page 4 / 8 » Exact and Approximate Aggregation in Constraint Query |
SIGMOD
2007
ACM
14 years 5 months ago
2007
ACM
This paper describes query processing in the DBO database system. Like other database systems designed for ad-hoc, analytic processing, DBO is able to compute the exact answer to ...
SEBD
2003
13 years 7 months ago
2003
Abstract. Sensor networks represent a non traditional source of information, as readings generated by sensors flow continuously, leading to an infinite stream of data. Traditiona...
DMSN
2004
ACM
13 years 11 months ago
2004
ACM
Recent work in sensor databases has focused extensively on distributed query problems, notably distributed computation of aggregates. Existing methods for computing aggregates bro...
GIS
2004
ACM
14 years 6 months ago
2004
ACM
The advances in wireless communication and decreasing costs of mobile devices have enabled users to access desired information at any time. Coupled with positioning technologies l...
SENSYS
2004
ACM
13 years 11 months ago
2004
ACM
Wireless sensor networks offer the potential to span and monitor large geographical areas inexpensively. Sensors, however, have significant power constraint (battery life), makin...