The normal forms can be divided into 5 forms, and they are explained below -
First Normal Form (1NF):
This should remove all the duplicate columns from the table. Creation of tables for the related data and identification of unique columns.
Second Normal Form (2NF):
Meeting all requirements of the first normal form. Placing the subsets of data in separate tables and Creation of relationships between the tables using primary keys.
Third Normal Form (3NF):
This should meet all requirements of 2NF. Removing the columns which are not dependent on primary key constraints.
Fourth Normal Form (4NF): Meeting all the requirements of third normal form and it should not have multi- valued dependencies.