题目:以下( )操作不能实现student表与sc之间的自然连接。
A. select student.* , cno, grade from student join sc on student.sno=sc.sno
B. select student.* , cno, grade from student , sc where student.sno=sc.sno
C. select student.* , sc.* from student , sc where student.sno=sc.sno
D. select student.sno, sname,ssex,sage,sdept , cno, grade from student , sc where student.sno=sc.sno
答案:评论后可见此内容