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relational type

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  • 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

  • Relational frame theory — Relational frame theory, or RFT, is a psychological theory of human language and cognition, developed largely through the efforts of Steven C. Hayes and Dermot Barnes Holmes and currently being tested in about three dozen laboratories around the… …   Wikipedia

  • Relational aggression — Relational aggression, also known as covert bullyingcite book |author=McGrath, Mary Zabolio |title=School Bullying: Tools for Avoiding Harm and Liability |publisher=Corwin Press |location=Thousand Oaks, Calif | url =… …   Wikipedia

  • 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 operator — In computer science, a relational operator is a programming language construct or operator that tests or defines some kind of relation between two entities. These include numerical equality (e.g., 5 = 5) and inequalities (e.g.,… …   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 quantum mechanics — This article is intended for those already familiar with quantum mechanics and its attendant interpretational difficulties. Readers who are new to the subject may first want to read the introduction to quantum mechanics. Relational quantum… …   Wikipedia

  • Relational Data Base —   A type of computer data base which supports many to many relationships between the data components …   International financial encyclopaedia

  • Tuple relational calculus — The tuple calculus is a calculus that was introduced by Edgar F. Codd as part of the relational model in order to give a declarative database query language for this data model. It formed the inspiration for the database query languages QUEL and… …   Wikipedia

  • Object-relational impedance mismatch — The object relational impedance mismatch is a set of conceptual and technical difficulties that are often encountered when a relational database management system (RDBMS) is being used by a program written in an object oriented programming… …   Wikipedia

  • Object-relational database — An object relational database (ORD), or object relational database management system (ORDBMS), is a database management system (DBMS) similar to a relational database, but with an object oriented database model: objects, classes and inheritance… …   Wikipedia

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