5. etapp: Loogilise andmemudeli tuletamine
Kompetentsi Andmete modelleerimine knobit · K-559 · Teadmine
Explains join dependency and fifth normal form
Mida see tähendab
When a three-way entity is the join of its projections, and the cyclic rule that makes it so.
Kuidas seda hinnatakse
Decides for sample three-way entities whether a cyclic rule holds and whether the entity should be decomposed
Tugineb
- Explains multivalued dependency and fourth normal formK-558 · Teadmine
Vajalik
- Recognises a join dependency kept in one entityK-513 · Oskus
- Recognises a connection trapK-523 · Oskus
- Explains sixth normal form for temporal dataK-560 · Teadmine