Referential integrity is used to ensure that relationships in tables are valid.

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Referential integrity is a database concept that ensures that relationships between tables remain synchronized and valid. It is used to enforce business rules or logical rules created by developers that relate to the relationships between records in different tables. When referential integrity is applied, any changes made to records in one table are validated against related records to ensure that the relationships between tables remain consistent.

Referential Integrity Is Used to Ensure That Relationships in Tables