data normalization

Can some one  explain to me first  3 forms of normalization.They are not very explanatory  in text books.Thanks.
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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.

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