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【简答题】
基于“学生.选课.课程”数据库中的如下三个关系: 学生基本信息:S(S#,SNAME,SEX,AGE) 选课信息:SC(S#,C#,GRADE) 课程信息:C(C#,CNAME,TEACHER) 若要求“查询选修了5门以上课程的学生的学生号”，正确的SQL语句是（ ）。 A)SELECT S# FROM SC ORDER BY S# WHERE COUNT(﹡)>5 B)SELECT S# FROM SC ORDER BY S# HAVING COUNT(﹡)>5 C)SELECT S# FROM SC GROUP BY S# WHERE COUNT(﹡)>5 D)SELECT S# FROM SC GROUP BY S# HAVING COUNT(﹡)>5
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