1500 search results - page 83 / 300 » Query Optimization in Database Grid |
ICDE
2006
IEEE
14 years 3 months ago
2006
IEEE
In this paper, we study SQL queries with aggregate subqueries that share common tables and conditions with the outer query. While several approaches can deal with such queries, th...
SSD
2007
Springer
14 years 3 months ago
2007
Springer
We address continuously processing an aggregation join query over data streams. Queries of this type involve both join and aggregation operations, with windows specified on join ...
SIGMOD
2002
ACM
14 years 9 months ago
2002
ACM
Statistics play an important role in influencing the plans produced by a query optimizer. Traditionally, optimizers use statistics built over base tables and assume independence b...
ICDE
2001
IEEE
14 years 10 months ago
2001
IEEE
We describe efficient algorithms for accurately estimating the number of matches of a small node-labeled tree, i.e., a twig, in a large node-labeled tree, using a summary data str...
SIGMOD
1996
ACM
14 years 1 months ago
1996
ACM
Repositories of multimedia objects having multiple types of attributes e.g., image, text are becoming increasingly common. A selection on these attributes will typically produce n...