以下( )操作实现了student表与sc之间的等值连接。
选项:
A:select student.* , cno, grade from student , sc where student.sno=sc.sno;;
B:select student.sno, sname,ssex,sage,sdept , cno, grade from student , sc where student.sno=sc.sno;;
C:select student.* , cno, grade from student join sc on student.sno=sc.sno;;
D:select student.* , sc.* from student , sc where student.sno=sc.sno;
发布时间:2024-05-07 19:28:00