functional dependency
functional dependency · functional dependencies
funktionale Abhängigkeit
Given a relation R and two sets of attributes X,Y⊆R, a constraint X→Y where each X…Given a relation R and two sets of attributes X,Y⊆R, a constraint X→Y where each X value in R is associated with precisely one Y value in R.
Значення
значень: 1Given a relation R and two sets of attributes X,Y⊆R, a constraint X→Y where each X value in R is associated with precisely one Y value in R.
funktionale Abhängigkeit
Переклади
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За значеннями 1
constraint between two sets of attributes in a relation:
Форми
множина: functional dependencies| Однина | functional dependency |
|---|---|
| Множина | functional dependencies |
правильне