SELECT 
c.CUST_CODE AS CODE,
c.CUST_NAME AS  NAME,
x.CNT
FROM 
CUSTOMER c LEFT JOIN 
ORDERS o ON
c.CUST_CODE = o.CUST_CODE
LEFT JOIN
(SELECT COUNT(ORDER_NO) CNT,
CUST_CODE
FROM ORDERS
GROUP BY CUST_CODE) x ON 
c.CUST_CODE = x.CUST_CODE
WHERE date(o.ORDER_DATE) BETWEEN date('2023-07-01') and date('2023-07-31')
GROUP BY c.CUST_CODE
ORDER BY
CNT DESC,CODE DESC