set-valued attribute

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

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• 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

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• Database models — A data model is not just a way of structuring data: it also defines a set of operations that can be performed on the data. The relational model, for example, defines operations such as select, project, and join. Although these operations may not… …   Wikipedia

• Bit — This article is about the unit of information. For other uses, see Bit (disambiguation). Fundamental units of information bit (binary) nat (base e) ban (decimal) qubit (quantum) This box …   Wikipedia

• Invention — An invention is a new form, composition of matter, device, or process. Some inventions are based on pre existing forms, compositions, processes or ideas. Other inventions are radical breakthroughs which may extend the boundaries of human… …   Wikipedia

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• Christianity — /kris chee an i tee/, n., pl. Christianities. 1. the Christian religion, including the Catholic, Protestant, and Eastern Orthodox churches. 2. Christian beliefs or practices; Christian quality or character: Christianity mixed with pagan elements; …   Universalium

• metaphysics — /met euh fiz iks/, n. (used with a sing. v.) 1. the branch of philosophy that treats of first principles, includes ontology and cosmology, and is intimately connected with epistemology. 2. philosophy, esp. in its more abstruse branches. 3. the… …   Universalium