Normalization is a database design technique which organizes tables in a manner that reduces redundancy and dependency of data. It divides larger tables into smaller tables and links them using relationships.
Which forms has a relation that possesses data about an individual entity:
2NF 3NF 4NF 5NF
A Table is in 4NF if and only if, for every one of its non-trivial multivalued dependencies X \twoheadrightarrow Y, X is a superkey—that is, X is either a candidate key or a superset thereof.