What is the date of enrollment of the course named "Spanish"?
create table student_course_enrolment (date_of_enrolment varchar, course_id varchar, PRIMARY KEY (date_of_enrolment)); create table courses (course_id varchar, course_name varchar, PRIMARY KEY (course_id))
select t2.date_of_enrolment from courses as t1 join student_course_enrolment as t2 on t1.course_id = t2.course_id where t1.course_name = "spanish"