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SQL Anywhere 12.0.0 » SQL Anywhere Server - SQL Usage » Ensuring data integrity » Enforcing entity and referential integrity

 

Foreign keys enforce referential integrity

Like primary keys, you use the CREATE TABLE or ALTER TABLE statements to create foreign keys. Once you create a foreign key, the column or columns in the key can contain only values that are present as primary key values in the table associated with the foreign key.

For more information about creating foreign keys, see Managing primary keys.