565 search results - page 63 / 113 » Multiple Range Query Optimization in Spatial Databases |
CIKM
2003
Springer
15 years 2 months ago
2003
Springer
Existing estimation approaches for multi-dimensional databases often rely on the assumption that data distribution in a small region is uniform, which seldom holds in practice. Mo...
SIGMOD
2005
ACM
15 years 3 months ago
2005
ACM
One of the most powerful features of SQL is the use of nested queries. Most research work on the optimization of nested queries focuses on aggregate subqueries. However, the solut...
DAWAK
1999
Springer
15 years 1 months ago
1999
Springer
One of the most challenging problems in data manipulation in the future is to be able to e ciently handle very large databases but also multiple induced properties or generalizatio...
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ICDE
2005
IEEE
15 years 11 months ago
2005
IEEE
The query optimizer of a database system is confronted with two aspects when handling user-defined functions (UDFs) in query predicates: the vast differences in evaluation costs b...
PODS
2010
ACM
15 years 2 months ago
2010
ACM
A scheme that publishes aggregate information about sensitive data must resolve the trade-off between utility to information consumers and privacy of the database participants. D...