which course has most number of registered students?
CREATE TABLE student_course_registrations (
    course_Id VARCHAR
)

CREATE TABLE courses (
    course_name VARCHAR,
    course_id VARCHAR
)
SELECT T1.course_name FROM courses AS T1 JOIN student_course_registrations AS T2 ON T1.course_Id = T2.course_Id GROUP BY T1.course_Id ORDER BY COUNT(*) DESC 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: which course has most number of registered students? ### Input: CREATE TABLE student_course_registrations (
    course_Id VARCHAR
)

CREATE TABLE courses (
    course_name VARCHAR,
    course_id VARCHAR
) ### Response: SELECT T1.course_name FROM courses AS T1 JOIN student_course_registrations AS T2 ON T1.course_Id = T2.course_Id GROUP BY T1.course_Id ORDER BY COUNT(*) DESC LIMIT 1