SELECT t1.email_address FROM customers AS t1 JOIN complaints AS t2 ON t1.customer_id  =  t2.customer_id GROUP BY t1.customer_id ORDER BY count(*) LIMIT 1
Find the emails of customers who has filed a complaints of the product with the most complaints.
SELECT t1.email_address FROM customers AS t1 JOIN complaints AS t2 ON t1.customer_id = t2.customer_id GROUP BY t1.customer_id ORDER BY count ( * ) LIMIT 1
select t1 . email_address from customers as t1 join complaints as t2 on t1 . customer_id = t2 . customer_id group by t1 . customer_id order by count ( * ) limit value
Find the emails of customers who has filed a complaints of the product with the most complaints .