Which of the following indicates the minimum number of entities that must be involved in a relationship?

Q. Which of the following indicates the minimum number of entities that must be involved in a relationship?

1. Minimum cardinality
2. Maximum cardinality
3. ERD
4. Greater Entity Count (GEC)

Answer: Minimum Cardinality

In the context of databases, cardinality refers to the uniqueness of data values contained in a column. High cardinality means that the column contains a large percentage of totally unique values. Low cardinality means that the column contains a lot of “repeats” in its data range.

Minimum cardinality is the minimum number of entity instances that must participate in a relationship. This number is generally zero or one.