data normalization

Can some one  explain to me first  3 forms of normalization.They are not very explanatory  in text books.Thanks.
mahmood_786Asked:
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fesnyngConnect With a Mentor Commented:
3NF:   The key, the whole key and nothing but the key, so help me Codd.

The following is not too bad an explanation.
http://www.informit.com/articles/article.aspx?p=102167&seqNum=3

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sbagireddiConnect With a Mentor Commented:
The best explaination there is with examples;

http://en.wikipedia.org/wiki/Database_normalization
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