Task: Text to Code
Input (English): Step 1: find the FIRST_NAME, LAST_NAME of employees table.
Step 2: find the FIRST_NAME, LAST_NAME of employees table for which COMMISSION_PCT equals null.
Step 3: show the rows that are in the results of step 1 but not in the results of step 2
Output (English): SELECT FIRST_NAME , LAST_NAME FROM employees EXCEPT SELECT FIRST_NAME , LAST_NAME FROM employees WHERE COMMISSION_PCT = "null"