Task: Text to Code
Input (English): Step 1: find the StuID of Student table.
Step 2: find the StuID of Has_Pet table.
Step 3: show the rows that are in the results of step 1 but not in the results of step 2
Output (English): SELECT T1.StuID FROM Student AS T1 EXCEPT SELECT T2.StuID FROM Has_Pet AS T2