Task: Text to Code
Input (English): SQL: SELECT cust_name FROM customer EXCEPT SELECT cust_name FROM customer WHERE acc_type = "Mortgages"
Feedback: In step 2 , Switch account type with corresponding loan's loan type .
Output (English): SELECT cust_name FROM customer EXCEPT SELECT T1.cust_name FROM customer AS T1 JOIN loan AS T2 ON T1.cust_id  =  T2.cust_id WHERE T2.loan_type  =  'Mortgages'