Stage 5: Derive the logical data model
Knobit of Data modelling · K-551 · Knowledge
Explains functional dependency
What it means
A dependency X -> Y holds when each value of X determines exactly one value of Y.
How it is assessed
States the definition and lists the functional dependencies of a sample entity from its business rules, not from its attribute names
Builds on
- None
Needed by
- Records the functional dependencies of an entityK-532 · Skill
- Explains candidate key and prime attributeK-552 · Knowledge
- Explains dependency preservationK-564 · Knowledge