Sciweavers

716 search results - page 25 / 144
» Optimizing Queries in Extended Relational Databases
Sort
View
SIGMOD
2001
ACM
124views Database» more  SIGMOD 2001»
15 years 11 months ago
Query Optimization In Compressed Database Systems
Over the last decades, improvements in CPU speed have outpaced improvements in main memory and disk access rates by orders of magnitude, enabling the use of data compression techn...
Zhiyuan Chen, Johannes Gehrke, Flip Korn
ISI
2008
Springer
14 years 11 months ago
Towards service-oriented continuous queries in pervasive systems
Pervasive information systems give an overview of what digital environments should look like in the future. From a data-centric point of view, traditional databases have to be used...
Yann Gripay, Frédérique Laforest, Je...
DEXA
2005
Springer
112views Database» more  DEXA 2005»
15 years 4 months ago
Distribution Rules for Array Database Queries
Abstract. Non-trivial retrieval applications involve complex computations on large multi-dimensional datasets. These should, in principle, benefit from the use of relational datab...
Alex van Ballegooij, Roberto Cornacchia, Arjen P. ...
SIGMOD
2008
ACM
122views Database» more  SIGMOD 2008»
15 years 11 months ago
Building query optimizers for information extraction: the SQoUT project
Text documents often embed data that is structured in nature. This structured data is increasingly exposed using information extraction systems, which generate structured relation...
Alpa Jain, Panagiotis G. Ipeirotis, Luis Gravano
PVLDB
2008
136views more  PVLDB 2008»
14 years 10 months ago
Keyword query cleaning
Unlike traditional database queries, keyword queries do not adhere to predefined syntax and are often dirty with irrelevant words from natural languages. This makes accurate and e...
Ken Q. Pu, Xiaohui Yu