国际化三面:找出语文排名第二的学生姓名,用order by limit应该是这个: select student.sname from student where sid=(select score.student_id from score left join course on course.cid=score.course_id where cname="语文" order by num desc limit 1,1); 还想请教大佬max(score) < max(score)是什么操作?小白求解~