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Question :

What is Normalization? explain all the normal forms.

Posted by: vishal umakkar on 5/18/2013

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Category Database Interview Questions
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Added on 5/18/2013
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Answers:

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Normalization : The process of decomposing tables to eliminate data redundancy is called Normalization.

1N.F:- The table should caontain scalar or atomic values.
2 N.F:- Table should be in 1N.F + No partial functional dependencies
3 N.F :-Table should be in 2 N.F + No transitive dependencies

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Posted by: Pankaj

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Normalization:
1)It is the process of organising data in a table.

2)It is the process of reducing redundancies(duplicates) in a table.

3)Normalization process is set of rules and each rule is called one normal form.

These are 5 types:
1 NF,2 nd NF,3 rd NF,Boyce Codd NF 4th NF,5th NF
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Posted by: kumar

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Normalization is the process which is used to remove redundancy from tables.
1normal form- In first normal form attribute value should be atomic.
i.e. value which we cant further divided.
2NF- In 2NF. It should be in 1NF and every non prime attributes are fully functionally depended on prime attributes.
3NF- Firstly it should be in 2 NF. and there is no transitivity i.e. a->b, b->c then a->c will not present in table.
Others are 4NF,5NF
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Posted by: Richa

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Normalization is the process to decompose the database and remove the redundency from the database.

The types of normalization are.

1)1 NF
2)2 nd NF
3)3 rd NF
4)Boyce codd NF
5)4 rth NF
6)5 th NF


Regards,
Nicku
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Posted by: nicku

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