Table schema:
CREATE TABLE student_course_registrations (student_id VARCHAR, registration_date VARCHAR); CREATE TABLE students (student_details VARCHAR, student_id VARCHAR)

Question: What is detail of the student who most recently registered course?
SQL: SELECT T2.student_details FROM student_course_registrations AS T1 JOIN students AS T2 ON T1.student_id = T2.student_id ORDER BY T1.registration_date DESC LIMIT 1