5. etapp: Loogilise andmemudeli tuletamine
Kompetentsi Andmete modelleerimine knobit · K-567 · Teadmine
Explains relationship cardinality and optionality
Mida see tähendab
Minimum and maximum participation of each end of a relationship, read in both directions.
Kuidas seda hinnatakse
States the cardinality and optionality of sample relationships in both directions from their rules
Tugineb
- Puudub
Vajalik
- Recognises a mandatory attribute without its moment of obligationK-112 · Oskus
- Recognises a cardinality rule stated from one end onlyK-318 · Oskus
- Recognises an unresolved many-to-many relationshipK-521 · Oskus
- Recognises a polymorphic associationK-522 · Oskus
- Recognises a redundant relationshipK-526 · Oskus
- Recognises a relationship contradicting its data ruleK-529 · Oskus
- Recognises a check weaker than its ruleK-711 · Oskus
- Resolves a many-to-many relationship into an associative entityK-534 · Oskus
- Explains the connection, fan and chasm trapsK-569 · Teadmine
- Explains referential integrity and referential actionsK-653 · Teadmine