Thursday, April 17, 2014

Nothing but the key: Nice mnemonic for database third normal form (3NF)

Saw this great mnemonic for 3NF at the above page:

A memorable statement of Codd's definition of 3NF, paralleling the traditional pledge to give true evidence in a court of law, was given by Bill Kent: "[Every] non-key [attribute] must provide a fact about the key, the whole key, and nothing but the key."[6] A common variation supplements this definition with the oath: "so help me Codd".[7]

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