Organizing the data in to multiple tables.

This is used to reduce the redundancy in a table.

First normal form: Removing redundancy.place  the data in to multiple tables.

second normal form: Non key attribute should depend on key attribute.i.e non primary key columns should depend on primary columns.

second normal form : key attribute should not depend on other key attribute.

Well a relational database is basically composed of tables that contain related data. So the Process of organizing this data into tables is actually referred to as normalization