A relational schema is in Boyce-Codd normal form if the determinant of every non-trivial functional dependency is a superkey.
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Boyce–Codd Normal Form (BCNF) is a type of database normalization used to reduce redundancy and potential anomalies in relational database design. It is an extension of the Third Normal Form (3NF) and addresses certain types of dependencies that 3NF does not handle adequately.