Task: Text to Code
Input (English): Step 1: For each row in Physician table, find the corresponding rows in Appointment table.
Step 2: find the number of rows of each value of Physician in the results of step 1.
Step 3: find SSN of step 1 results with smallest value in the results of step 2
Output (English): SELECT T1.SSN FROM Physician AS T1 JOIN Appointment AS T2 ON T1.EmployeeID = T2.Physician GROUP BY T2.Physician ORDER BY Count ( * ) Asc LIMIT 1