List the names of teachers who have not been arranged to teach courses.
CREATE TABLE course_arrange (Name VARCHAR, Teacher_id VARCHAR); CREATE TABLE teacher (Name VARCHAR, Teacher_id VARCHAR)
SELECT Name FROM teacher WHERE NOT Teacher_id IN (SELECT Teacher_id FROM course_arrange)
### Context: CREATE TABLE course_arrange (Name VARCHAR, Teacher_id VARCHAR); CREATE TABLE teacher (Name VARCHAR, Teacher_id VARCHAR) ### Question: List the names of teachers who have not been arranged to teach courses. ### Answer: SELECT Name FROM teacher WHERE NOT Teacher_id IN (SELECT Teacher_id FROM course_arrange)