What is normalization and what are the five normal forms?

Normalization is a design procedure for representing data in tabular format. The five normal forms are progressive rules to represent the data with minimal redundancy.
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muamee

  • Jun 14th, 2010
 

Normalization in DB2 is used to reduce data redundancy and maintain integrity.
There are 4 types normalization
1st type: Every instances of an entiry should contain only one value.
2nd type: Each attribute which is not a primary key provides information that depends on the entire key.
3rd type: If each non-primary key gives a fact that is independent of other non-key attributes and dependent on key.
4th type: If no instances contain 2 or more independent multi-valued facts about an entity.

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