Find the id of the courses that do not have any prerequisite?
CREATE TABLE prereq (course_id VARCHAR); CREATE TABLE course (course_id VARCHAR)
SELECT course_id FROM course EXCEPT SELECT course_id FROM prereq
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE prereq (course_id VARCHAR); CREATE TABLE course (course_id VARCHAR) Question: Find the id of the courses that do not have any prerequisite? [/INST] SELECT course_id FROM course EXCEPT SELECT course_id FROM prereq </s>