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Explain 1st, 2nd, 3rd normalization form of data base
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Answer Posted / misam ami
1st normal: A relvar is in 1NF if and only if,in every every legal value of that relavar,every tuple contains exactly one value for each attribute.
3rd normal: A relvar is in 3NF if and only if for all time,each tuple consist of a primary key value that identifies some entity,together with a set of zero or more mutually independent attribute values that describes values that describe that entity in some way.
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