Context: CREATE TABLE Courses (course_name VARCHAR, course_id VARCHAR); CREATE TABLE Sections (course_id VARCHAR)
Question: What are the names and id of courses having at most 2 sections?
Answer: SELECT T1.course_name, T1.course_id FROM Courses AS T1 JOIN Sections AS T2 ON T1.course_id = T2.course_id GROUP BY T1.course_id HAVING COUNT(*) <= 2