4397 search results - page 108 / 880 » Relational Algebra Operations |
DEDUCTIVE
1994
13 years 11 months ago
1994
Non-deterministic operators are needed in First-Order relational languages and Datalog to extend the expressive power of such languages and support efficient formulations of lowco...
ER
2004
Springer
14 years 3 months ago
2004
Springer
When we derive multi-scale databases from a source spatial database, the geometries and topological relations, which are a kind of constraints defined explicitly or implicitly in ...
VLDB
1991
ACM
14 years 1 months ago
1991
ACM
We explore the implications of supporting bags (i.e. multisets) in a data model and associated query language, and present some formal results concerned with the algebraic propert...
ENTCS
2006
13 years 10 months ago
2006
In this article we present a method to define algebraic structure (field operations) on a representation of real numbers by coinductive streams. The field operations will be given...
WISE
2002
Springer
14 years 3 months ago
2002
Springer
To make the World Wide Web machine-understandable there is a strong demand both for languages describing metadata and for languages querying metadata. The Resource Description Fram...