Question

I am trying to pull students and the courses they are registered for from a mysql database. I want to replace the course id with the course name in the output.

I have these tables and columns:

table: users_to_courses
columns: users_LOGIN and courses_ID

table: users
columns: login, name and surname

table: courses
columns: id and name

The tables tie together on the following:

users_to_courses.users_LOGIN = users.login 
users_to_courses.courses_ID = courses.id

I am trying to get output of surname, name, courses (by name and not id) so it would look like Smith, John Chemistry, Physics, Composition

Here is what I am trying unsuccessfully:

SELECT
users.surname,
users.name,
users.login,
users_to_courses.users_LOGIN,
(select group_concat (courses.name) from courses
where users_to_courses.users_LOGIN = users.login and users_to_courses.courses_ID =    
courses.id
GROUP BY users.surname) as courses
from courses join users_to_courses
on courses.id = users_to_courses.courses_ID

Answer 1

Try this

Select

    u.surname,
    u.name,
    u.login,
    uc.users_LOGIN,
    c.Name,

    --added this line
    group_concat (c.name)  
From users_to_courses uc
JOIN users u ON uc.users_LOGIN = u.login 
JOIN courses c ON uc.courses_ID = c.id

-- added this line
GROUP BY u.surname, u.name, u.login, uc.users_LOGIN