1168 search results - page 18 / 234 » Optimization strategies for complex queries |
ICDE
2006
IEEE
14 years 1 months ago
2006
IEEE
We consider the problem of query optimization in distributed stream based systems where multiple continuous queries may be executing simultaneously. In such systems, distribution ...
PODS
2001
ACM
14 years 7 months ago
2001
ACM
The need to search for complex and recurring patterns in database sequences is shared by many applications. In this paper, we discuss how to express and support efficiently sophis...
SSD
2001
Springer
14 years 2 days ago
2001
Springer
Several studies have focused on the efficient processing of simple spatial query types such as selections and spatial joins. Little work, however, has been done towards the optimiz...
GLOBE
2009
Springer
14 years 8 days ago
2009
Springer
Skyline queries help users make intelligent decisions over complex data, where different and often conflicting criteria are considered. A challenging problem is to support skylin...
SIGMOD
1999
ACM
13 years 12 months ago
1999
ACM
In large data warehousing environments, it is often advantageous to provide fast, approximate answers to complex aggregate queries based on statistical summaries of the full data....