DBI202Xuất hiện trong 1 đề thi
What is the condition that a relation schema $R$ is in BCNF (Boyce-Codd Normal Form)?
Các lựa chọn
AIt is in 3NF and satisfies an additional constraint that for every non-trivial FD: $X \to A$, $X$ must be a candidate key
BIf every non-prime attribute $A$ in $R$ is fully functionally dependent on primary key
CIf every non-prime attribute is not-transitively dependent on primary key
DNone of the others