Section 1
Review Question
What is the purpose of ER modeling?
What are the basic ER modeling constructs?
What is a unique attribute?
What is depicted by cardinality constraints?
What are the four possible cardinality constraints?
What are the three types of relationships (maximum cardinality-wise)?
What is a composite attribute?
What are candidate keys?
What is a multivalued attribute?
What is a derived attribute?
What is an optional attribute?
How are exact minimum and maximum cardinalities depicted in a relationship?
What is a binary relationship?
What is a unary relationship?
What is a weak entity?
What is an associative entity?
What is a ternary relationship?