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Database Design Fundamentals for Software Engineers

Boyce-Codd Normal Form

Explore Boyce-Codd Normal Form (BCNF), a key step in database normalization. Understand how BCNF improves table structure by eliminating dependencies where non-prime attributes determine prime attributes. This lesson explains BCNF conditions, illustrates with examples, and shows table decomposition to create efficient, well-structured relational databases.

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Boyce-Codd normal form (BCNF)

For a table to satisfy the Boyce-Codd normal form, it should satisfy the following two conditions:

  1. It should be in the third normal form.

  2. And, for any dependency A → B, A should be a super key.

The second point sounds a bit tricky, right? In simple words, it means that for a dependency A →\rightarrow B, A cannot be a non-prime attribute if B ...