select s.sno,s.sname,tmp.avg_sc
from student s
join (select sno, ROUND(avg(score),2) avg_sc from sc group by sno having avg_sc > 60) tmp on s.sno = tmp.sno;
这个题就比较简单,用sc表分组过滤之后再join到stu表。
select s.sno,s.sname,tmp.avg_sc
from student s
join (select sno, ROUND(avg(score),2) avg_sc from sc group by sno having avg_sc > 60) tmp on s.sno = tmp.sno;
这个题就比较简单,用sc表分组过滤之后再join到stu表。