Systems Analysis and Design Study Set 1
Quiz 9: Data Design
A popular rule of thumb is that a design is in 3NF if every nonkey field depends on the key, the whole key, and nothing but the key.
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A table design is in second normal form (2NF) if it is in 1NF and if all fields that are not part of the primary key are functionally independent of part of the primary key.
A table design is in third normal form (3NF) if it is in 2NF and if all nonkey fields are dependent on other nonkey fields.
Normal forms beyond 3NF exist, but they rarely are used in business-oriented systems.
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