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  • Binary Relationship

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    A Binary relationship is when there is relation between two entities.This relationship is further divided into three types.

    1. One to One
    2. One to Many
    3. Many to one
    4. Many to Many

    1.One to One: In this relationship, one entity can be associated with just one entity.
    For Example: A student enrolls only for one course and a course will also have only one Student. We rarely found this scenario in real world.

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    2. One to Many:In this relationship, one entity can be associated with many entities.
    For Example: A Subject can avail many courses and Each courses belongs to one Student.

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    3. Many to one:In this relationship, many entities can be associated with just one entity.
    For Example:Student enrolls for only one Course but a Course can have many Students.

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    4. Many to Many:In this relationship, many entities can be associated with many entities.
    For Examplemany students can enroll for more than one courses.

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