what is 2nfa relation schema r is in 2nf if it is
What is 2NF?
A relation schema R is in 2NF if it is in 1NF and every non-prime attribute A in R is fully functionally dependent on primary key.
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define canonical covera canonical cover fc for f is a set of dependencies like f logically implies all dependencies in fc and fc logically shows all
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what is 2nfa relation schema r is in 2nf if it is in 1nf and every non-prime attribute a in r is fully functionally dependent on primary
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define query optimizationquery optimization refers to the process of search the lowest -cost method of evaluating a given
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