5. etapp: Loogilise andmemudeli tuletamine
Kompetentsi Andmete modelleerimine knobit · K-533 · Oskus
Decomposes an entity along a functional dependency without loss
Mida see tähendab
Repairs a normal-form violation by moving the determinant and its dependents into an entity of their own, losslessly and preserving dependencies.
Kuidas seda hinnatakse
The shared attributes are a key of one part, no dependency is left spanning two entities, and the dependent attributes move with their determinant
Tugineb
- Explains lossless-join decompositionK-563 · Teadmine
- Explains dependency preservationK-564 · Teadmine
Vajalik
- Puudub