Final answer:
Constraints are stored both in the parent table and the child table, and they are defined and managed within the database metadata.
Step-by-step explanation:
The question asks where constraints are stored in the context of a database. Constraints are rules applied to the data in the database, and they ensure the accuracy and reliability of the data. They can be related to primary keys, foreign keys, unique constraints, check constraints, default values, or others.
Constraints can be associated with a particular table or across tables. For primary keys and unique constraints which are intrinsic to a particular table, the constraints are usually stored in the metadata associated with that specific table, which is often considered as the parent table when relationships are defined. Foreign key constraints, on the other hand, reference a parent table but are stored in the referencing or child table. Thus, the correct answer to the question is not just one location. Constraints are stored in both the parent table and the child table, and they are defined and managed in the database metadata.