Sciweavers

1654 search results - page 227 / 331
» Ontology Based Query Processing in Database Management Syste...
Sort
View
126
Voted
SIGMOD
1996
ACM
132views Database» more  SIGMOD 1996»
15 years 7 months ago
Cost-Based Optimization for Magic: Algebra and Implementation
Magic sets rewriting is a well-known optimization heuristic for complex decision-support queries. There can be many variants of this rewriting even for a single query, which diffe...
Praveen Seshadri, Joseph M. Hellerstein, Hamid Pir...
139
Voted
EDBT
2011
ACM
209views Database» more  EDBT 2011»
14 years 7 months ago
An optimal strategy for monitoring top-k queries in streaming windows
Continuous top-k queries, which report a certain number (k) of top preferred objects from data streams, are important for a broad class of real-time applications, ranging from fi...
Di Yang, Avani Shastri, Elke A. Rundensteiner, Mat...
121
Voted
DGO
2000
91views Education» more  DGO 2000»
15 years 5 months ago
Simplifying data access: the energy data collection (EDC) project
The massive amount of statistical and text data available from government agencies has created a set of daunting challenges to both research and analysis communities. These proble...
José Luis Ambite, Yigal Arens, Luis Gravano...
ICDE
2007
IEEE
155views Database» more  ICDE 2007»
15 years 10 months ago
Query-Aware Sampling for Data Streams
Data Stream Management Systems are useful when large volumes of data need to be processed in real time. Examples include monitoring network traffic, monitoring financial transacti...
Theodore Johnson, S. Muthukrishnan, Vladislav Shka...
118
Voted
WWW
2007
ACM
16 years 4 months ago
Exploit sequencing views in semantic cache to accelerate xpath query evaluation
In XML databases, materializing queries and their results into views in a semantic cache can improve the performance of query evaluation by reducing computational complexity and I...
Jianhua Feng, Na Ta, Yong Zhang, Guoliang Li