Joining a table based on comma separated values

Question

How can I join two tables, where one of the tables has multiple comma separated values in one column that reference an id in another column?

1st

Answer 1

Maybe this uglyness, I have not checked results:

select names.name, courses.course_name
from names inner join courses
    on ',' + names.course_ids + ',' like '%,' + cast(courses.course_id as nvarchar(20)) + ',%'