DBI202Xuất hiện trong 1 đề thi
Given a $R(A,B,C,D)$ with the following FDs: $AB \to D$ $BC \to A$ $AD \to B$ $CD \to B$ $AD \to C$ Choose a correct statement about R:
Các lựa chọn
AThe FD set of R is not canonical and R is in BCNF
BThe FD set of R is canonical and R is not in BCNF
CThe FD set of R is not canonical and R is not in BCNF