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Database training
3.2.09. Normal forms (2NF)
In context
Not 2NF: AB → C, A → C
AB → C is not in 2NF, because B can be removed
Not 2NF: AB → CDE, B → DE
because attributes D&E are dependent on part of the composite key (B of AB), not all of it
‹ 3.2.08. Normal forms (2NF)
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3.2.10. Normalisation (2NF) ›
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