167 search results - page 15 / 34 » Power Hints for Query Optimization |
ICDE
2006
IEEE
14 years 8 months ago
2006
IEEE
Relational division, also known as small divide, is a derived operator of the relational algebra that realizes a many-to-one set containment test, where a set is represented as a ...
ESCIENCE
2007
IEEE
13 years 11 months ago
2007
IEEE
Provenance management has become increasingly important to support scientific discovery reproducibility, result interpretation, and problem diagnosis in scientific workflow enviro...
HPDC
2008
IEEE
14 years 1 months ago
2008
IEEE
If the model of free-form queries, which has proved successful for HTML based search on the Web, is made available for Grid services, it will serve as a powerful tool for scientis...
AMW
2011
12 years 11 months ago
2011
Subqueries are a poweful feature which allows to enforce reuse, composition, rewriting and optimization in a query language. In this paper we perform a comprehensive study of the i...
VLDB
2004
ACM
14 years 22 days ago
2004
ACM
At a fundamental level, the key challenge in data integration is to reconcile the semantics of disparate data sets, each expressed with a different database structure. I argue th...