在学生选课表SC中，查询选修了3号课程的学生的学号(XH)及其成绩(CJ)。查询结果按分数的降序排列。实现该功能的正确SQL语句是( )。 A: SELECT XH, CJFROM SC WHERE CH=′3′ORDER BY CJDESC B: SELECT XH, CJ FROM SC WHERE CH=′3′ORDER BY CJ ASC C: SELECT XH, CJ FROM SC WHERE CH=′3′GROUP BY CJ DESC D: SELECT XH, CJFROM SC WHERE CH=′3′GROUP BY CJ ASC
在学生选课表SC中，查询选修了3号课程的学生的学号(XH)及其成绩(CJ)。查询结果按分数的降序排列。实现该功能的正确SQL语句是( )。 A: SELECT XH, CJFROM SC WHERE CH=′3′ORDER BY CJDESC B: SELECT XH, CJ FROM SC WHERE CH=′3′ORDER BY CJ ASC C: SELECT XH, CJ FROM SC WHERE CH=′3′GROUP BY CJ DESC D: SELECT XH, CJFROM SC WHERE CH=′3′GROUP BY CJ ASC
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