Question: Find the name of students who have taken the prerequisite course of the course with title International Finance.
Schema: create table student (name varchar, id varchar, PRIMARY KEY (name)); create table course (course_id varchar, title varchar, PRIMARY KEY (course_id)); create table prereq (prereq_id varchar, course_id varchar, PRIMARY KEY (prereq_id)); create table takes (id varchar, course_id varchar, PRIMARY KEY (id))
SQL: select t1.name from student as t1 join takes as t2 on t1.id = t2.id where t2.course_id in (select t4.prereq_id from course as t3 join prereq as t4 on t3.course_id = t4.course_id where t3.title = 'international finance')