Relational Data Modeling - One-to-One Relationship


A one-to-one relationship is a relational relationship that is equivalent to the set bijection relationship

This relationship describe that one row from a relation point to exactly one row to the other relation.

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There are severals way to model a one-to-one relationship:

As a relation itself is a one-to-one relational structure, it means that the two relation (tables) could also be merge in one.

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