Find the id of instructors who taught a class in Fall 2009 but not in Spring 2010.
CREATE TABLE teaches (id VARCHAR, semester VARCHAR, YEAR VARCHAR)
SELECT id FROM teaches WHERE semester = 'Fall' AND YEAR = 2009 EXCEPT SELECT id FROM teaches WHERE semester = 'Spring' AND YEAR = 2010
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE teaches (id VARCHAR, semester VARCHAR, YEAR VARCHAR) Question: Find the id of instructors who taught a class in Fall 2009 but not in Spring 2010. [/INST] SELECT id FROM teaches WHERE semester = 'Fall' AND YEAR = 2009 EXCEPT SELECT id FROM teaches WHERE semester = 'Spring' AND YEAR = 2010 </s>