【单选题】April Fools' Special: History's Hoaxes Happy April Fools' Day. To mark the occasion, Notional Geographic News has compiled a list of some of the more memorable hoaxes in recent history. They are the l...
【单选题】有一个学生表student,包含主键S#(学生编号)等。又有分数表SC,包含S#(学生编号)、score(分数)等。已知student表中共有50个学生,有45人参加了考试(分数存在SC表中),其中10人不及格。执行以下SQL语句:select * from student where S# not in (select S# from SC where score<60 ), 可返回______...