User talk:Callavinash1

September 2012
Hello, I'm Tobias Bergemann. I noticed that you recently made an edit to Database normalization that seemed to be a test. Your test worked! If you want more practice editing, the sandbox is the best place to do so. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thank you. Tobias Bergemann (talk) 11:07, 17 September 2012 (UTC)

this is testing purpose.
this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.this is testing purpose.

Database normalization
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 between them. The objective is to isolate data so that additions, deletions, and modifications of a field can be made in just one table and then propagated through the rest of the database via the defined relationships.

Edgar F. Codd, the inventor of the relational model, introduced the concept of normalization and what we now know as the First Normal Form (1NF) in 1970.[1] Codd went on to define the Second Normal Form (2NF) and Third Normal Form (3NF) in 1971,[2] and Codd and Raymond F. Boyce defined the Boyce-Codd Normal Form (BCNF) in 1974.[3] Informally, a relational database table is often described as "normalized" if it is in the Third Normal Form.[4] Most 3NF tables are free of insertion, update, and deletion anomalies.12345