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three-valued logic [1 record]

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Record 1 2012-02-02

English

Subject field(s)
  • Mathematics
  • Computer Mathematics
CONT

Three-valued logic is an extension to traditional logic that involves an additional value "unknown" in addition to "true" and "false."

Key term(s)
  • 3-valued logic

French

Domaine(s)
  • Mathématiques
  • Mathématiques informatiques
OBS

Quand, dans une condition logique élémentaire d’une requête SQL, un attribut de valeur nulle est testé, la valeur logique rendue par la condition n'est ni «vrai», ni «faux», mais «inconnu» (unknown). Cela a nécessité d’étendre la logique de Boole à une logique à trois valeurs : «true», «false» et «unknown».

Spanish

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