Write an SAP Business One Query

Would like to write a query that shows us the following: Customers we normally deliver to on a certain day (Sales Order Delivery Date should be a variable). Show us all customers that have ordered more than once in the last 2 months But on top of this, show us whether these customers have a valid Sales Order with us for that Sales Order Delivery Date that was selected (so that we can see which customers we still need to call/chase for an order). Attached is a query which I am stuck with as I can't get it working but if someone is able to help that would be great!