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bn:00993119n
Noun Concept
Categories: All articles needing additional references, Database management systems, Relational model, Relational algebra
EN
relational algebra  antijoin  extended projection  join  natural join
EN
In database theory, relational algebra is a theory that uses algebraic structures for modeling data, and defining queries on it with a well founded semantics. Wikipedia
Definitions
Relations
Sources
EN
In database theory, relational algebra is a theory that uses algebraic structures for modeling data, and defining queries on it with a well founded semantics. Wikipedia
An offshoot of first-order logic and of algebra of sets concerned with operations over finitary relations Wikipedia Disambiguation
Family of algebras used for modelling the data stored in relational databases, and defining queries on it Wikidata
HAS PART
selection
DIFFERENT FROM
relation algebra
DISCOVERER OR INVENTOR
Edgar F. Codd
Wikipedia
EN
relational algebra
Wikidata
EN
relational algebra
Wikipedia Redirections
EN
antijoin, extended projection, join (relational algebra), natural join, Relational Algebra, relational logic, semijoin, Theta join, ⋈, ▷, ⟕, ⟖, ⟗, ⨝

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