programming-examples/sql/Subqueries/12. Write a query to find all orders with order amounts which are above-average amounts for their customers.sql

/*12. Write a query to find all orders with order amounts which are above-average amounts for their customers..*/
SELECT *   
FROM orders a  
WHERE purch_amt >  
    (SELECT AVG(purch_amt) FROM orders b   
     WHERE b.customer_id = a.customer_id);