One to One Relationship Cardinality in DBMS

One to One Relationship Cardinality in DBMS

 

In this article, we will learn about the One to one Relationship Cardinality in DBMS.

Cardinality tells how many times the entity of an entity set participates in a relationship

There are four different types of cardinalities one to one, many to one, one to many, many to many. here  will discuss how one to one cardinality  is observed.

One to One Relationship Cardinality in DBMS

One to one cardinality

  • When a single instance of an entity is associated with a single instance of another entity, then it is called as one to one cardinality
  • Here each entity of the entity set participate only once in the relationship

Example for one to one cardinality

Assume that the only male can be married to only one female and one female can be married to only one male, this  can be viewed as one to one  cardinality.

Read More About other Cardinalities :