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What normal forms are there based on concepts of functional dependencies? please input . What is a superkey A superkey is a combination of columns

What normal forms are there based on concepts of functional dependencies? please input .

What is a superkey

A superkey is a combination of columns that uniquely identifies any row within a relational database management system (RDBMS) table.

What is a key please input 4. Below which is not correct?

A relation Risi 3NF but not in 2NF Every 2NF relation is in INF Every Nation is in 25 Every BCN relations in NF

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