relational algebra

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relational algebra

(database, theory)
A family of algebra with a well-founded semantics used for modelling the data stored in relational databases, and defining queries on it. The main operations of the relational algebra are the set operations (such as union, intersection, and cartesian product), selection (keeping only some lines of a table) and the projection (keeping only some columns).

The relational data model describes how the data is structured.

Codd's reduction algorithm can convert from relational calculus to relational algebra.

relational algebra

(1) The branch of mathematics that deals with relations; for example, AND, OR, NOT, IS and CONTAINS.

(2) In a relational database, a collection of rules for dealing with tables; for example, JOIN, UNION and INTERSECT.
References in periodicals archive ?
Can non-relational approaches provide better performance than relational approaches?
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Integrating relational and non-relational data from different platforms and databases for use in a single application has always been a complex, expensive and painful challenge for IT organizations," said Paul Bach, president of Striva Corporation.
Relational aesthetics was formulated at an auspicious moment in the technological arc of '90s art.

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