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What is 3 NF (Normal Form) in database?
A relation schema R is in 3NF 
1.It is in 2NF 
2.No non-prime attribute A in R is transitively dependent on the primary key. Transitive dependent means if there a set of attribute Z that are neither a primary or candidate key and both X-->Z  and Y-->Z holds.
Posted By: Name:Rajesh Kr URL: What is 3 NF (Normal Form) in database?