777 search results - page 34 / 156 » Optimization of Relational Preference Queries |
226
Voted
ICDE
2003
IEEE
16 years 4 months ago
2003
IEEE
Structural join operations are central to evaluating queries against XML data, and are typically responsible for consuming a lion's share of the query processing time. Thus, ...
153
Voted
SWWS
2010
15 years 15 days ago
2010
- Today there is a real challenge in accessing relevant information according to the needs and the context of the user. Recent studies have dynamically enhanced the user query with...
128
Voted
PEPM
2009
ACM
15 years 11 months ago
2009
ACM
Abstract. This paper presents techniques and tools to transform spreadsheets into relational databases and back. A set of data refinement rules is introduced to map a tabular data...
107
click to vote
ICDE
2000
IEEE
15 years 7 months ago
2000
IEEE
We consider an architecture of mediators and wrappers for Internet accessible WebSources of limited query capability. Each call to a source is a WebSource Implementation (WSI) and...
111
Voted
VLDB
2004
ACM
15 years 8 months ago
2004
ACM
Histograms and Wavelet synopses provide useful tools in query optimization and approximate query answering. Traditional histogram construction algorithms, such as V-Optimal, optim...