查询每门课程最高分的学生的学号,课程号,成绩
成绩表score的结构:
如何查询每门课程最高分的学生的学号,课程号,成绩?
答案:
select t1.sid,t1.cid,t1.score from score t1 where t1.score = ( select max(t2.score) from score t2 where t2.cid = t1.cid group by t2.cid )
如果要知道学生的姓名:
select t1.sid,s.name,t1.cid,t1.score from score t1 inner join stu s on t1.sid=s.id where t1.score = ( select max(t2.score) from score t2 where t2.cid = t1.cid group by t2.cid )