Recognises an update anomaly in a logical data model

Mida see tähendab

One fact is stored in several rows, so a change must be repeated and a partial change leaves the data contradicting itself.

Kuidas seda hinnatakse

Flags the deficient case and passes the acceptable one. Deficient: Account holder address held on every Account; the customer moves and three of their five accounts are updated Acceptable: Address held once on Party; Account reaches it through Account Holder

Tugineb

Explains the insertion, update and deletion anomaliesK-553 · Teadmine

Vajalik

Recognises an unmanaged duplicate columnK-601 · Oskus