415 search results - page 63 / 83 » Efficient Processing of Relational Queries with Sum Constrai... |
VLDB
1994
ACM
13 years 11 months ago
1994
ACM
This paper introduces a formalism to describe the needs and preferences of database users. Because of the precise formulation of these concepts, we have found an automatic and ver...
SIGMOD
2003
ACM
14 years 7 months ago
2003
ACM
While work in recent years has demonstrated that wavelets can be efficiently used to compress large quantities of data and provide fast and fairly accurate answers to queries, lit...
VLDB
2008
ACM
14 years 7 months ago
2008
ACM
Abstract Existing spatiotemporal indexes suffer from either large update cost or poor query performance, except for the Bx -tree (the state-of-the-art), which consists of multiple ...
CSB
2005
IEEE
14 years 29 days ago
2005
IEEE
With the rapid growth of biomedical research databases, opportunities for scientific inquiry have expanded quickly and led to a demand for computational methods that can extract b...
ACL
2006
13 years 8 months ago
2006
Unification grammars are widely accepted as an expressive means for describing the structure of natural languages. In general, the recognition problem is undecidable for unificati...