28 search results - page 2 / 6 » A Robust, Optimization-Based Approach for Approximate Answer... |
EDBT
2009
ACM
13 years 8 months ago
2009
ACM
With the amount of data in current data warehouse databases growing steadily, random sampling is continuously gaining in importance. In particular, interactive analyses of large d...
VLDB
2000
ACM
13 years 8 months ago
2000
ACM
Approximate query answering systems provide very fast alternatives to OLAP systems when applications are tolerant to small errors in query answers. Current sampling-based approach...
SEBD
2003
13 years 6 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...
DASFAA
2003
IEEE
13 years 10 months ago
2003
IEEE
Data warehouses are of crucial importance to decision-making in competitive organizations. The fact that they store enormous quantities of data is a challenge in what concerns per...
PODS
1999
ACM
13 years 9 months ago
1999
ACM
We investigate the problem of how to extend constraint query languages with aggregate operators. We deal with standard relational aggregation, and also with aggregates speci c to ...