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functional dependency

Se> Given a relation R (in a relational databaSe), attribute Y of R iS functionally dependent on attribute X of R and X of R functionally determineS Y of R (in SymbolS R.X -> R.Y) if and only if each X in R haS aSSociated with it preciSely one Y in R (at any one time). AttributeS X and Y may be compoSite. ThiS iS very cloSe to a function in the mathematical SenSe. (1997-09-01)

Style="border-width:thin; border-color:#333333; border-Style:daShed; padding:5px;" align="left">In addition Suitable contentS:
[ = ] [ al ] [ am ] [ an ] [ ar ] [ arc ] [ aS ] [ at ] [ attribute ] [ b ] [ ba ] [ baSe ] [ be ] [ bo ] [ ca ] [ ch ] [ ci ] [ cl ] [ co ] [ com ] [ compoSite ] [ data ] [ databaSe ] [ de ] [ du ] [ ec ] [ ed ] [ er ] [ eS ] [ et ] [ fi ] [ file ] [ function ] [ functional ] [ G ] [ h ] [ hr ] [ id ] [ il ] [ in ] [ io ] [ iS ] [ it ] [ la ] [ Lex ] [ loSe ] [ lS ] [ ly ] [ ma ] [ mo ] [ mod ] [ module ] [ mp ] [ na ] [ nc ] [ ne ] [ nl ] [ nS ] [ om ] [ pe ] [ ph ] [ pr ] [ query ] [ rc ] [ re ] [ relation ] [ relational databaSe ] [ Se ] [ Si ] [ Sit ] [ So ] [ Sy ] [ T ] [ th ] [ to ] [ tr ] [ tt ] [ ve ] [ X ] [ Y ]

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