Unary Relationship in DBMS

Unary Relationship in DBMS

  • A relationship represents the association between two are more entities
  • The relationship also shows the different entity sets that are participating in a relationship, these relationships very much useful analyzing the design process of the system

We have observed unary, binary n-ary, recursive, ternary relationships in a database design schema. Here  we will discuss how unary relationship exists

Unary relationship

When there is only one entity set participating in a relationship then such type of relationship is called unary relationship


Example of unary relationship

For example, a person has only one passport and only one passport is given to only one person and hence unary relationship is observed

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