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Let R(ABCDE) be a relation in Boyce-Codd Normal Form (BCNF). If ABC is the only key for R, describe all the nontrivial functional dependencies that
Let R(ABCDE) be a relation in Boyce-Codd Normal Form (BCNF). If ABC is the only key for R, describe all the nontrivial functional dependencies that hold for R. Identify one of these FD's from the following list. |
a) | ACDE ? B | |
b) | AC E ? D | |
c) | AB ? A | |
d) | ABC ? D |
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