你需要给STUDENTS表的STUDENT_ID列上添加一个逐渐,当前该表中没有数据,下面哪个命令可以完成这个需求?()
A.ALTERTABLEstudentsADDPRIMARYKEYstudent_id
B.ALTERTABLEstudentsADDCONSTRAINTPRIMARYKEY(student_id)
C.ALTERTABLEstudentsADDCONSTRAINTstud_id_pkPRIMARYKEYstudent_id
D.ALTERTABLEstudentsADDCONSTRAINTstud_id_pkPRIMARYKEY(student_id)
E.ALTERTABLEstudentsMODIFYCONSTRAINTstud_id_pkPRIMARYKEY(student_id)