448 search results - page 69 / 90 » Queries and Constraints on Semi-structured Data |
142
click to vote
ICDE
2007
IEEE
15 years 11 months ago
2007
IEEE
Queries containing outer joins are common in data warehousing applications. Materialized outer-join views could greatly speed up many such queries but most database systems do not...
GIS
1999
ACM
15 years 1 months ago
1999
ACM
Spatial indexes, such as the PMR quadtree, are important in spatial databases for efficient execution of queries involving spatial constraints, especially when the queries involv...
IJCGA
2000
14 years 9 months ago
2000
We present e cient algorithms for several instances of the following facility location problem. Facilities and demand sites are represented as points in the plane. Place k obnoxio...
DASFAA
2003
IEEE
15 years 2 months ago
2003
IEEE
Various models and approaches have been proposed for mapping XML data into relational tables recently. Most of those approaches produce relational schema for given XML data, based...
CIKM
2004
Springer
15 years 3 months ago
2004
Springer
We explore join optimizations in the presence of both timebased constraints (sliding windows) and value-based constraints (punctuations). We present the first join solution named...