Query the names of students with 2 or more failing subjects and their average grades - Code World

Query the names of students with 2 or more failing subjects and their average grades

Others 2022-04-23 02:43:46 views: 0

There are three tables S (student number s#, name sname,...), C (course number c# , course name cname,...), SC (student number s#, course number c# , grade...) 
select sname,avg(grade) 
from s, sc 
 where ss#= sc .s# and grade<60 
group by sname 
having by count(grade)>=2

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