what is id of students who registered some courses but the least number of courses in these students?
CREATE TABLE student_course_registrations (
    student_id VARCHAR
)
SELECT student_id FROM student_course_registrations GROUP BY student_id ORDER BY COUNT(*) LIMIT 1
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: what is id of students who registered some courses but the least number of courses in these students? ### Input: CREATE TABLE student_course_registrations (
    student_id VARCHAR
) ### Response: SELECT student_id FROM student_course_registrations GROUP BY student_id ORDER BY COUNT(*) LIMIT 1