select TBL_DEPT.DEPT_CODE,
       TBL_CUST.CUST_NAME,
       TBL_ORDERS.ORDER_NO,
       TBL_CUST.CUST_CODE,
       TBL_CUST.CUST_NAME,
       TBL_ORDERS.ORDER_AMT

from TBL_ORDERS

inner join TBL_DEPT
on TBL_ORDERS.DEPT_CODE = TBL_DEPT.DEPT_CODE

left outer join TBL_CUST
on TBL_ORDERS.CUST_CODE = TBL_CUST.CUST_CODE

order by TBL_ORDERS.DEPT_CODE asc
,TBL_ORDERS.ORDER_NO asc;