问题
单项选择题
What Normal Form is the student table shown ( ) student table (s _ id, s _ name, s _ sex, s _ old, depart _ id, depart _ name) s _ id→s _ name, s _ sex, s _ old, depart _ id depart _ id→depart _ name
A．1NF
B．2NF
C．3NF
D．BCNF
答案
参考答案：B