Database normalization is the process of organizing the fields and tables of a relational database to minimize redundancy and dependency. Normalization usually involves dividing large tables into smaller (and less redundant) tables and defining relationships among them. Normalization is a bottom-up technique for database design.
The evolution of Normalization theories is illustrated below:
• First Normal Form (1NF)
• Second Normal Form (2NF)
• Third Normal Form (3NF)
• Boyce-Codd Normal Form (BCNF)
• 4th Normal Form
• 5th Normal Form
• 6th Normal Form
