![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
设有S(学号,姓名,性别)和SC(学号,课程号,成绩)两个表,如下SQL语句检索选修的每门课程的成绩都高于或等于85
设有S(学号,姓名,性别)和SC(学号,课程号,成绩)两个表,如下SQL语句检索选修的每门课程的成绩都高于或等于85分的学生的学号、姓名和性别,正确的是( )。
A.SELECT 学号,姓名,性别 FROM S WHERE EXISTS;
(SELECT*FROM SC WHERE SC.学号=S.学号 AND 成绩<=85)
B.SELECT 学号,姓名,性别 FROM S WHERE NOT EXISTS;
(SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩<=85)
C.SELECT 学号,姓名,性别 FROM S WHERE EXISTS;
(SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩>85)
D.SELECT 学号,姓名,性别 FROM S WHERE NOT EXISTS;
(SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩<85)
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)