SQL query for Courses Enrolment on Moodle

Question

I was looking for the proper SQL queries for retrieving all students enrolled in a certain course, or all courses a certain student has enrolled in, on Moodle

Answer 1

The following code generates a list of all your courses together with how many students are enrolled in each. Useful to find out if you have any courses with no one enrolled.

My Answer :

SELECT cr.SHORTNAME, 
       cr.FULLNAME, 
       COUNT(ra.ID) AS enrolled 
FROM   `MDL_COURSE` cr 
       JOIN `MDL_CONTEXT` ct 
         ON ( ct.INSTANCEID = cr.ID ) 
       LEFT JOIN `MDL_ROLE_ASSIGNMENTS` ra 
              ON ( ra.CONTEXTID = ct.ID ) 
WHERE  ct.CONTEXTLEVEL = 50 
       AND ra.ROLEID = 5 
GROUP  BY cr.SHORTNAME, 
          cr.FULLNAME 
ORDER  BY `ENROLLED` ASC