Types of normalization

Question

Hi How many types of normalization in Database? What are they? Thanks.

Sujeet Suman · Answer

A K please once go through below link. This may help you more: https://blog.udemy.com/normalization-in-database-with-example/ http://www.c-sharpcorner.com/uploadfile/nipuntomar/normalization-and-its-types/ https://en.wikipedia.org/wiki/Database_normalization If this is helpful for you then please accept my Answer .

Sivaraman Dhamodaran · Answer

Have a look at the below article which may help: Article http://www.mstecharticles.com/2010/11/normalization-of-data.html

Raj Kumar · Answer

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Hemant Kumar · Answer

It is set of rules that have been established to aid in the design of tables that are meant to be connected through relationships. This set of rules is known as Normalization First Normal Form Second Normal form Third normal form http://www.allinterview.com/showanswers/20409.html

Deepak Sharma · Answer

There are 5 forms or levels of normalization in a database named as 1NF 2NF 3NF 4NF and 5NF. Generally we use normalization methods upto 4NF. 5NF is rarely used. http://www.sqlservercentral.com/blogs/abhijit_desai/2010/09/07/noramlization/ http://www.c-sharpcorner.com/uploadfile/freebookarticles/addisonwesley/2009sep01014823am/NorDatModel/5.aspx

Satyapriya Nayak · Answer

Hi Alok Please refer the below link http://www.dotnetfunda.com/interview/exclusive/x949-what-is-normalization-or-what-are-the-different-types-of-normalization.aspx Thanks

Ajitender Vijay · Answer

Hi Database normalization is a technique for designing relational database tables to minimize duplication of information and in so doing to safeguard the database against certain types of logical or structural problems namely data anomalies. 1NF Eliminate Repeating Groups - Make a separate table for each set of related attributes and give each table a primary key. 2NF Eliminate Redundant Data - If an attribute depends on only part of a multi-valued key remove it to a separate table. 3NF Eliminate Columns Not Dependent On Key - If attributes do not contribute to a description of the key remove them to a separate table. BCNF Boyce-Codd Normal Form - If there are non-trivial dependencies between candidate key attributes separate them out into distinct tables. 4NF Isolate Independent Multiple Relationships - No table may contain two or more 1:n or n:m relationships that are not directly related. 5NF Isolate Semantically Related Multiple Relationships - There may be practical constrains on information that justify separating logically related many-to-many relationships. ONF Optimal Normal Form - a model limited to only simple (elemental) facts as expressed in Object Role Model notation. DKNF Domain-Key Normal Form - a model free from all modification anomalies. Thanks