Task: Text to Code
Input (English): SQL: SELECT T2.LastName FROM Customer AS T1 JOIN Employee AS T2 ON T1.SupportRepId = T2.EmployeeId GROUP BY T1.SupportRepId HAVING Count ( * ) < = 20
Feedback: should find CUSTOMER's last name
Output (English): SELECT T1.LastName FROM CUSTOMER AS T1 JOIN EMPLOYEE AS T2 ON T1.SupportRepId  =  T2.EmployeeId GROUP BY T1.SupportRepId HAVING COUNT(*)  <=  20