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SQL Anywhere 11.0.0 » SQL Anywhere Server - SQL Usage » Designing and Creating Databases » 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.