Sciweavers

238 search results - page 31 / 48
» The Data Cyclotron query processing scheme
Sort
View
IDEAS
2000
IEEE
96views Database» more  IDEAS 2000»
14 years 2 months ago
A Cost Function for Uniformly Partitioned UB-Trees
Most operations of the relational algebra or SQL - like projection with duplicate elimination, join, ordering, group by and aggregations - are efficiently processed using a sorted...
Volker Markl, Rudolf Bayer
DATESO
2008
131views Database» more  DATESO 2008»
13 years 11 months ago
Towards Cost-based Optimizations of Twig Content-based Queries
Abstract In recent years, many approaches to indexing XML data have appeared. These approaches attempt to process XML queries efficiently and sufficient query plans are built for t...
Michal Krátký, Radim Baca
BTW
2007
Springer
123views Database» more  BTW 2007»
14 years 4 months ago
Data Provenance: A Categorization of Existing Approaches
: In many application areas like e-science and data-warehousing detailed information about the origin of data is required. This kind of information is often referred to as data pro...
Boris Glavic, Klaus R. Dittrich
SENSYS
2004
ACM
14 years 3 months ago
Medians and beyond: new aggregation techniques for sensor networks
Wireless sensor networks offer the potential to span and monitor large geographical areas inexpensively. Sensors, however, have significant power constraint (battery life), makin...
Nisheeth Shrivastava, Chiranjeeb Buragohain, Divya...
SIGMOD
2004
ACM
199views Database» more  SIGMOD 2004»
14 years 10 months ago
Approximate XML Query Answers
The rapid adoption of XML as the standard for data representation and exchange foreshadows a massive increase in the amounts of XML data collected, maintained, and queried over th...
Neoklis Polyzotis, Minos N. Garofalakis, Yannis E....