1500 search results - page 78 / 300 » Query Optimization in Database Grid |
VLDB
1998
ACM
14 years 1 months ago
1998
ACM
Users often can not easily express their queries. For example, in a multimedia image by content setting, the user might want photographs with sunsets; in current systems, like QBI...
GCC
2007
Springer
14 years 3 months ago
2007
Springer
Data integration has evolved to provide efficient data management across distributed and heterogeneous data sources in grid environment. However, existing works in data integratio...
ICDE
2003
IEEE
14 years 10 months ago
2003
IEEE
Query optimizers use base-table statistics to derive statistics on the sub-plans that are enumerated during optimization. In practice, traditional optimizers rely on a number of s...
SIGMOD
2003
ACM
14 years 9 months ago
2003
ACM
In decision support applications, the ability to provide fast approximate answers to aggregation queries is desirable. One commonly-used technique for approximate query answering ...
VLDB
2002
ACM
13 years 8 months ago
2002
ACM
The cost of a query plan depends on many parameters, such as predicate selectivities and available memory, whose values may not be known at optimization time. Parametric query opt...