Query sql needed to remove customers that aint ordered

I want to remove all customers that haven't made orders previously as i have recently made telephone verification part of my checkout process. The customers did at one point have orders but i deleted them all to start from scratch and left the customers as members for some insane reason. so now i have 255 customers and only 45 of them have made orders. Does anyone mind helping me out in making a query to run to remove these 200 or so customers details?? :hug: