Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE Student_Course_Enrolment (student_id VARCHAR)
TABLE: CREATE TABLE Students (personal_name VARCHAR)
TABLE: CREATE TABLE Students (personal_name VARCHAR, student_id VARCHAR)

### Question ###
Find the personal names of students not enrolled in any course.

### Accurate SQL ###

SELECT personal_name FROM Students EXCEPT SELECT T1.personal_name FROM Students AS T1 JOIN Student_Course_Enrolment AS T2 ON T1.student_id = T2.student_id