Task: Text to Code
Input (English): SQL: SELECT name FROM employee EXCEPT SELECT name FROM employee
Feedback: Need to make sure employees does not have certificate for aircraft's distance equals Boeing 737 800.
Output (English): SELECT name FROM Employee EXCEPT SELECT T1.name FROM Employee AS T1 JOIN Certificate AS T2 ON T1.eid  =  T2.eid JOIN Aircraft AS T3 ON T3.aid  =  T2.aid WHERE T3.name  =  "Boeing 737-800"