Relationships that are 1:1 do not require referential integrity constraints.

Question

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Referential integrity constraints are used to ensure consistency between related tables in a database, regardless of whether the relationship is 1:1, 1:N, or N:M. In a 1:1 relationship, referential integrity ensures that each row in one table corresponds to one and only one row in the related table, and vice versa, maintaining data accuracy and consistency.

Relationships That Are 1:1 Do Not Require Referential Integrity Constraints