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Define in which normalisation form if an attribute of a composite key is dependent on an attribute of other composite key.
Ans: 3NF
A relation is in 3 NF if an attribute of a composite key is relies on an attribute of other composite key. (If an attribute of a composite key is relies upon an attribute of other composite key then the relation is not in BCNF, therefore it has to be decomposed.)
what is er digram given that example of hospital,bank and library er digram.
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