find the student id and personal name of the student whose course id is 2
SELECT T1.student_id , T2.personal_name FROM Student_Course_Enrolment AS T1 JOIN Students AS T2 ON T1.student_id  =  T2.student_id where T1.course_id = '2'
student id and personal name of the student whose course id is 2 refers to joining Student_Course_Enrolment and Students tables on student_id and filtering where course_id = '2';