functional dependency

Fetched 2026-10-26 (cache).

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Noun

1. {{lb|en|database normalization}} Given a [[relation]] ''R'' and two [[sets]] of [[attributes]] <math>X,Y \subseteq R</math>, a [[constraint]] <math>X \rightarrow Y</math> where each ''X'' value in ''R'' is associated with precisely one ''Y'' value in ''R''.

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