33.假设所有的选课成绩都已确定,显示“101”号课程成绩最高的10%记录信息,正确的SQL命令是( )
(A)SELECT * TOP 10 FROM 选课 OR (D)R BY 成绩WHERE 课程号=”101” (B) SELECT * PERCENT 10 FROM 选课 OR (D)R BY (D)SC成绩WHERE 课程号
=”101”
(C)SELECT * TOP 10 PERCENT FROM 选课 OR (D)R BY 成绩WHERE 课程号=”101”
(D) SELECT * TOP 10 PERCENT FROM 选课 OR (D)R BY 成绩 (D)SC WHERE 课程号=”101”