A unary relationship exists when an association is maintained within a single entity.
What is unary relationship?
One in which there is a relationship between instances of the same entity set is referred to as a unary relationship, which is also known as recursive. The primary and foreign keys in this relationship are the same yet represent two distinct entities with distinct functions.
What is a unary one-to-many relationship?
A one-to-many unary relationship is a connection between instances of the same entity that are represented by several role groups. Take into account the dynamic between managers and employees. In this interaction, there are two distinct roles: managers and employees.
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