- Mike Chapple. Referential Integrity. About.com. [2011-03-20]. （原始内容存档于2016-11-19）.
Definition: Referential integrity is a database concept that ensures that relationships between tables remain consistent. When one table has a foreign key to another table, the concept of referential integrity states that you may not add a record to the table that contains the foreign key unless there is a corresponding record in the linked table.