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DBMS Interview Questions and Answers

Ques. What is 3NF?
Ans.
A relation schema R is in 3NF if it is in 2NF and for every FD X A either of the following is true 
1. X is a Super-key of R. 
2. A is a prime attribute of R. 
In other words, if every non prime attribute is non-transitively dependent on primary key. 
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