Resolves a many-to-many relationship into an associative entity

Mida see tähendab

Turns a many-to-many relationship into an entity of its own so that its facts (roles, dates, shares) have a place.

Kuidas seda hinnatakse

The facts of the relationship live on the associative entity, its cardinality is stated both ways, and attributes duplicated elsewhere to stand in for it are removed

Tugineb

Explains relationship cardinality and optionalityK-567 · Teadmine
Explains identifying and non-identifying relationshipsK-904 · Teadmine

Vajalik

Puudub