&"a way of structuring the data in a relational database according to formal rules, in order to avoid problems of efficiency and security in accessing and maintain the data.&"
&"a way of structuring the data in a relational database according to formal rules, in order to avoid problems of efficiency and security in accessing and maintain the data.&"
obtaining 3nf achieves the desirable database properties by making the semantics of each field explicit and clear (1nf) and by eliminating database redundancies (2nf and 3nf)