with tmp as(
select CUST_CODE as CODE,
CUST_NAME as NAME,
(select count(distinct b.ORDER_DATE)
   from ORDERS b
  where b.CUST_CODE = a.CUST_CODE
    and b.ORDER_DATE between '2023-07-01' and '2023-07-31') as CNT
  from CUSTOMER a)
select * from tmp
where cnt > 0
order by CNT desc,CODE desc