3nf normalization example pdf form

Normalization divides larger tables into smaller tables and links them using relationships. Third normal form 3nf create a website sql data warehousing css php html database normalization. First normal form 1nf second normal form 2nf boycecodd normal form bcnf fourth normal form 4nf fifth normal form 5nf remove multivalued attributes remove remaining anomalies resulting from multiple candidate keys figure. You will also learn how to design a table which follows the third normal form. Third normal form 3nf a table is said to be in the third normal form when, it is in the second normal form. Normalization in databases help organize tables and keeps records clean. This lesson will cover the third normal form of database normalization which, through the extension of the second normal. The added advantage of getting an organized package of data that helps in a performance boost is also a very notable use of normalization. The purpose of normalization is to eliminate redundant useless data and ensure data is stored logically. The rules associated with the most commonly used normal forms, namely first 1nf, second 2nf, and third 3nf. But we suggest you to first study about the second normal form and then head over to the third normal form. An example of how to bring the database table structure to 3rd normal form is shown.