4397 search results - page 3 / 880 » Relational Algebra Operations |
CORR
2004
Springer
13 years 7 months ago
2004
Springer
In the 1970s Codd introduced the relational algebra, with operators selection, projection, union, difference and product, and showed that it is equivalent to first-order logic. In ...
ORDER
2006
13 years 7 months ago
2006
We investigate ways of representing ordered sets as algebras and how the order relation is reflected in the algebraic properties of the variety (equational class) generated by the...
JCSS
2002
13 years 7 months ago
2002
A database programming language is a programming language extended with database operations. In this paper we extend a core functional language with explicitly labeled tuples and ...
ICDE
2006
IEEE
14 years 9 months ago
2006
IEEE
To effectively support today's global economy, database systems need to manage data in multiple languages simultaneously. While current database systems do support the storag...
CORR
2008
Springer
13 years 7 months ago
2008
Springer
With the rise of XML as a standard for representing business data, XML data warehouses appear as suitable solutions for Web-based decision-support applications. In this context, i...