id,user_id,course_id,enrolled_at
2.000000000000000000,1,2,2023-02-01
5.000000000000000000,4,3,2023-04-01
1.000000000000000000,1,1,2023-01-15
3.000000000000000000,2,1,2023-01-20
4.000000000000000000,3,2,2023-03-05