Database_Canonical form

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Database_Canonical form

Postby monika17ap » Thu Nov 21, 2013 11:18 am

Can anyone explain canonical form and minimal canonical form??
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Re: Database_Canonical form

Postby sameer2009 » Thu Nov 21, 2013 3:10 pm

There might be some extra attributes on the either side (LHS or RHS) of a Functional dependency in the original set of Functional dependencies. If such extra attributes are eliminated from respective Functional dependency, then we get a reduced set of Functional dependencies. Such reduced set of Functional dependency is equivalent to the original set of Functional dependency.
Such reduced set of Functional dependency is called as Canonical set of Functional Dependencies.
Please refer DBMS material or "Korth" for how to eliminate the extra attributes from a Functional dependency.
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