下列哪个语句可以查询选修了3门以上课程的学生学号选项: A:SELECT Sno FROM SC WHERE COUNT(Cno)>=3 B:SELECT Sno FROM SC GROUP BY Sno HAVING COUNT(Cno)>=3 C:SELECT Sno FROM SC GROUP BY Sno WHERE COUNT(Cno)>=3 D:SELECT Sno FROM SC GROUP BY Sno HAVING SUM(Cno)>=3 语句 可以 哪个 发布时间:2024-05-07 19:16:32