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The degree of relationship means the number of entities associated with a relationship in a relational model. Based on the number of entities associated we have the following degree of relationships. Unary Relationship In this only a single entity is associated in a relation. It is mostly used to represent the recursive relationship, which means a single entity can be further divided into multiple categories. Like in a company multiple employees work. To manages these all employees a manager is appointed who is also counted as an employee. Here manager is an employee first then a manager. So, we can represent this relationship like this: Binary Relationship In this, two entities are associated in a relationship. This is most commonly used. This is easy to describe and maintains simplicity. Here in the above relation, two entities are associated in a single relationship, so the degree of relationship is 2 hence it is a Binary relationship. Ternary Relationship In this, thr