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Definition
of Third Normal Form: Third
Normal Form can be summarized by a pun: "the Key, the whole Key and
nothing but the Key, so help me Codd!" A
normalized database uses Primary Keys to create Relationships. The
Table that is in Third Normal Form has only Keys. Primary
Keys and Foreign Keys, Only When a database has been designed in Third Normal
Form, the Tables that summarize the data should be only Primary
Keys.
CustomerID. That's a
very, very brief explanation of normalizing a database. Let's
build the Receipt Form, then come back to these concepts again.
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