There are many kinds
of entity relationships in a database model. The relationships can
be classified by the following things.Cardinality: maximum and minimumDegree: binary, ternary, degree 4, and so forthEntity type: strong, weak, ID-dependent, and supertype or
subtypeWhat are these
different types of classifications? Do they overlap, or do they
each tell us something unique about the entity relationship? Why is
it important to classify each of these types in an ERD model?