在se-score表中查询存在成绩为空的学生的学号和课程号,以下逻辑可以实现的是? ( )
选项:
A:select studentno,courseno from se-cuurse where score=null;
B:select studentno.courseno from se-cuurse where score is noll:
C:select studentno,courseno from se cuurse where score=",
D:select studentno,courseno from se-curse where score=/N;
发布时间:2024-07-17 17:53:18