在choose表创建成功后,再为choose表添加外键约束,约束名为choose_student_fk,外键为student_no,参照 student表的stud_no字段,以下命令正确的是( )。
A.
alter table choose add constraint choose_student_fk FOREIGN KEY (student_no);
B.
alter table choose add constraint choose_student_fk REFERENCES student(stud_no);
C.
alter table choose add constraint choose_student_fk FOREIGN KEY (stud_no) REFERENCES student(student_no);
D.
alter table choose add constraint choose_student_fk FOREIGN KEY (student_no) REFERENCES student(stud_no);