Normalization in sql

Normalization is a database design technique. It reduces redundancy and dependency of data.It divides larger tables into smaller tables and links them using relationships.

4 types of normalizations are used.

1. First Normal Form(1NF)
*Each table cell should have a single value.
*Each record should be unique.

2.Second Normal Form(2NF)
*It should be 1NF
*Primary key column

3.Third Normal Form (3NF)
*It should be 2NF
*No transitive dependency

4.Boyce code Normal Form
*All the colums in the table should be dependent on the super key.

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