Third Normal Form (3NF)

Third Normal Form (3NF) is a database design principle aimed at reducing redundancy and improving data integrity. To achieve 3NF, a database must first be in Second Normal Form (2NF) and meet two criteria: it should not have any non-key attribute dependent on another non-key attribute, and all attributes should depend only on the primary key. This means that each piece of information is stored in one place only, preventing inconsistencies and making it easier to update data without affecting related information. Essentially, 3NF helps ensure that your data is organized efficiently.