A functional dependency is called a partial dependency if there is a proper subset
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A functional dependency α → β is called a partial dependency if there is a proper subset γ of α such that γ → β.We says that β is partially dependent on α. A relation schema R is in second normal form (2NF) if each attributes A in R meets one of the following criteria:
• It appears in a candidate key.
• It is not partially dependent on a candidate key. Show that every 3NF schema is in 2NF.
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Referring to the definitions in Exercise 725 a relation schema R is said to be in 3NF if there ...View the full answer
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