389 search results - page 24 / 78 » A Framework for the Investigation of Aggregate Functions in ... |
CIDR
2007
13 years 8 months ago
2007
We present a “black-box” approach to estimating query cardinality that has no knowledge of query execution plans and data distribution, yet provides accurate estimates. It doe...
SIGMOD
2009
ACM
14 years 7 months ago
2009
ACM
Commercial database systems expose query hints to fix poor plans produced by the query optimizer. However, current query hints are not flexible enough to deal with a variety of no...
ICDE
2009
IEEE
14 years 8 months ago
2009
IEEE
Abstract-- Recent work has demonstrated that readings provided by commodity sensor nodes are often of poor quality. In order to provide a valuable sensory infrastructure for monito...
DEXA
2000
Springer
13 years 10 months ago
2000
Springer
This paper is mainly concerned with the extension of database management systems querying capabilities, so that users may address queries involving preferences and get discriminate...
SOSP
2009
ACM
14 years 3 months ago
2009
ACM
Data-intensive applications are increasingly designed to execute on large computing clusters. Grouped aggregation is a core primitive of many distributed programming models, and i...