top 10 kurzistů

This query is marked as a draft This query has been published by Hubaceksarka.

SQL

use cswiki_p;
select user.user_id, user.user_name, count(*) as course_taken_count
from ep_users_per_course AS user_per_course
join user AS user
on user.user_id=user_per_course.upc_user_id
join ep_courses AS courses
on user_per_course.upc_course_id=courses.course_id
where user_per_course.upc_role=0
group by user.user_id,user.user_name
order by course_taken_count desc
limit 100;

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