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SIGMOD
2005
ACM
111views Database» more  SIGMOD 2005»
16 years 4 months ago
Efficient Computation of Multiple Group By Queries
Data analysts need to understand the quality of data in the warehouse. This is often done by issuing many Group By queries on the sets of columns of interest. Since the volume of ...
Zhimin Chen, Vivek R. Narasayya
LAWEB
2005
IEEE
15 years 9 months ago
Optimized Index Structures for Querying RDF from the Web
Storing and querying Resource Description Framework (RDF) data is one of the basic tasks within any Semantic Web application. A number of storage systems provide assistance for th...
Andreas Harth, Stefan Decker
DOOD
1997
Springer
163views Database» more  DOOD 1997»
15 years 8 months ago
On a Declarative Semantics for Web Queries
With the increasing importance of the World Wide Web as an information source, there is a growing interest for integration of Web and database technology. Several Web query languag...
Rainer Himmeröder, Georg Lausen, Bertram Lud&...
CIVR
2006
Springer
139views Image Analysis» more  CIVR 2006»
15 years 8 months ago
Finding People Frequently Appearing in News
Abstract. We propose a graph based method to improve the performance of person queries in large news video collections. The method benefits from the multi-modal structure of videos...
Derya Ozkan, Pinar Duygulu
PODS
2009
ACM
113views Database» more  PODS 2009»
16 years 4 months ago
Relative information completeness
The paper investigates the question of whether a partially closed database has complete information to answer a query. In practice an enterprise often maintains master data Dm, a ...
Wenfei Fan, Floris Geerts