FUNCTIONAL DEPENDENCY

Domain	Definition
Computing	Functional dependency 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). Source: The Free On-line Dictionary of Computing.
Source: compiled by the editor from various references; see credits.

Specialty Definition: Functional dependency

A functional dependency is a constraint between two sets of attributes from a database.

An attribute X is said to functionally determine another attribute Y (X->Y) if and only if each X value is associated with precisely one Y value.

Crosswords: FUNCTIONAL DEPENDENCY

Specialty definitions using "FUNCTIONAL DEPENDENCY": multivalued dependency. (references)

Source: compiled by the editor from various references; see credits.

Misspellings: FUNCTIONAL DEPENDENCY

Misspellings
	"FUNCTIONAL DEPENDENCY" is suggested in spellcheckers for the following: functional dependancy. (additional references)
Source: compiled by the editor, based on several corpora (additional references).

Alternative Orthography: FUNCTIONAL DEPENDENCY

Hexadecimal (or equivalents, 770AD-1900s) (references)

Leonardo da Vinci (1452-1519; backwards) (references)

Binary Code (1918-1938, probably earlier) (references)

HTML Code (1990) (references)

ISO 10646 (1991-1993) (references)

Encryption (beginner's substitution cypher): (references)