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» A Query System in a Biological Database
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DAGSTUHL
1993
15 years 5 months ago
Syntax and Semantics of Hybrid Database Languages
Abstract. We present the hybrid query language HQL/EER for an Extended Entity-Relationship model. As its main characteristic, this language allows a user to freely mix graphical an...
Marc Andries, Gregor Engels
ICDE
2006
IEEE
147views Database» more  ICDE 2006»
15 years 10 months ago
Optimizing Multiple Queries in Distributed Data Stream Systems
We consider the problem of query optimization in distributed stream based systems where multiple continuous queries may be executing simultaneously. In such systems, distribution ...
Sangeetha Seshadri, Vibhore Kumar, Brian F. Cooper
ICDE
1997
IEEE
172views Database» more  ICDE 1997»
15 years 8 months ago
Modeling and Querying Moving Objects
In this paper we propose a data model for representing moving objects in database systems. It is called the Moving Objects Spatio-Temporal (MOST) data model. We also propose Futur...
A. Prasad Sistla, Ouri Wolfson, Sam Chamberlain, S...
129
Voted
IDEAS
2007
IEEE
148views Database» more  IDEAS 2007»
15 years 10 months ago
Boundedness of Regular Path Queries in Data Integration Systems
In this paper we study the problem of deciding whether a regular path query over views in data-integration systems can be re-expressed without recursion. The problem becomes chall...
Gösta Grahne, Alex Thomo
156
Voted
SIGMOD
2003
ACM
147views Database» more  SIGMOD 2003»
16 years 4 months ago
Formal semantics and analysis of object queries
Modern database systems provide not only powerful data models but also complex query languages supporting powerful features such as the ability to create new database objects and ...
Gavin M. Bierman