DBI202Xuất hiện trong 1 đề thi
In SQL, which of the following statements is correct?
Các lựa chọn
AAll relations in 2NF are also in BCNF
BAll relations in 1NF are also in BCNF
CAll relations in 3NF are also in BCNF
DFor any relation schema, there is a dependency-preserving decomposition into 3NF