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3NF Normal Form
A relation schema R is in 3NF if it is in 2NF and for each FD X A either of the following is true
In other words, if every non prime attribute is non-transitively related on primary key.
CREATE TABLE prodtrans ( pno number (4) ptype char (1) CHECK (ptype in ('I','R','S')), qty number (5) FOREIGN KEY pno REFERENCES product (pno) ON DELETE CASCADE);
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
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#questiontypes of keys examples..
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Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
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