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  1. Submitted By: k — July 24, 2008
    +7 votes
      + -

    Unnormalized relation will contain update,insert,deletion anamolies. 1nf will remove repeating colums. 2nf will remove subsets of data. In 2nf every non-key attribute should depend on entire primary key
    In 3nf, all columns should depend directly upon primary key and transitive dependency should be removed(a->b b->c c->a).
    In 4nf, multivalued dependancy should be removed.
    In BCNF, every determinant should be a candidate key.

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