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Relational model

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  1. for database management is a database model based on first-order predicate logic, first formulated and proposed in 1969 by Edgar Codd

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on November 25, 2008
  2. Its core idea is to describe a database as a collection of predicates over a finite set of predicate variables, describing constraints on the possible values and combinations of values

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on November 25, 2008
  3. was invented by E.F. (Ted) Codd as a general model of data, and subsequently maintained and developed by Chris Date and Hugh Darwen among others

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on November 25, 2008
  4. The fundamental assumption of the relational model is that all data is represented as mathematical n-ary relations, an n-ary relation being a subset of the Cartesian product of n domains

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on November 25, 2008
  5. To fully appreciate the relational model of data it is essential to understand the intended interpretation of a relation

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on November 25, 2008
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