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relational+model

См. также в других словарях:

  • Relational model — The relational model for database management is a database model based on first order predicate logic, first formulated and proposed in 1969 by Edgar Codd. [ Derivability, Redundancy, and Consistency of Relations Stored in Large Data Banks , E.F …   Wikipedia

  • Relational Model/Tasmania — (RM/T) was published by E.F. Codd in 1979 and is the name given to a number of extensions to his original relational model (RM) published in 1970. The overall goal of the RM/T was to define some fundamental semantic units, at atomic and molecular …   Wikipedia

  • Probabilistic relational model — A Probabilistic relational model (PRM) is the counterpart of a Bayesian network in statistical relational learning. External links* [http://forum.stanford.edu/research/project.php?id=164 A description of PRMs] …   Wikipedia

  • Relational calculus — consist of two calculi, the tuple relational calculus and the domain relational calculus, that are part of the relational model for databases and provide a declarative way to specify database queries. This in contrast to the relational algebra… …   Wikipedia

  • Relational — may refer to: *Relational (mathematics) *Relational aggression *Relational algebra *Relational art *Relational database *Relational calculus *Relational operator *Relational model *Relational theory *Relational philosophy *Relational… …   Wikipedia

  • Relational database — A visual diagram showing the relationship between the two tables, as indicated by the arrow A relational database matches data by using common characteristics found within the data set. The resulting groups of data uses the relational model (a… …   Wikipedia

  • Relational database management system — A Relational database management system (RDBMS) is a database management system (DBMS) that is based on the relational model as introduced by E. F. Codd. Most popular commercial and open source databases currently in use are based on the… …   Wikipedia

  • Relational algebra — Not to be confused with Relation algebra. Relational algebra, an offshoot of first order logic (and of algebra of sets), deals with a set of finitary relations (see also relation (database)) that is closed under certain operators. These operators …   Wikipedia

  • Relational Database Management System — Eine relationale Datenbank dient zur elektronischen Datenverwaltung in Computersystemen und beruht auf dem relationalen Datenbankmodell. Dieses wurde 1970 von Edgar F. Codd erstmals vorgeschlagen und ist bis heute, trotz einiger Kritikpunkte, ein …   Deutsch Wikipedia

  • Relational Database Management Systems — Eine relationale Datenbank dient zur elektronischen Datenverwaltung in Computersystemen und beruht auf dem relationalen Datenbankmodell. Dieses wurde 1970 von Edgar F. Codd erstmals vorgeschlagen und ist bis heute, trotz einiger Kritikpunkte, ein …   Deutsch Wikipedia

  • Relational theory — …: This article is about relational theory in physics and philosophy. There is a separate article about the relational model (database) and Relational Philosophy as a category of Philosophical anthropology In physics and philosophy, a relational… …   Wikipedia

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