programming-examples/sql/Joins/Write a SQL statement to make a list in ascending order for the customer who works either through a salesman or by own.sql

/*Write a SQL statement to make a list in ascending order for the customer who works either through a salesman or by own.*/
SELECT a.cust_name,a.city,a.grade,   
b.name AS "Salesman",b.city   
FROM customer a   
LEFT JOIN salesman b   
ON a.salesman_id=b.salesman_id   
order by a.customer_id;