Database: customers_and_orders
Question: Show all the order dates and ids of the orders with quantity of any product larger than 6 or with more than 3 products.
SQL:
SELECT T1.order_date ,  T1.order_id FROM Customer_Orders AS T1 JOIN Order_items AS T2 ON T1.order_id  =  T2.order_id WHERE T2.order_quantity  >  6 UNION SELECT T1.order_date ,  T1.order_id FROM Customer_Orders AS T1 JOIN Order_items AS T2 ON T1.order_id  =  T2.order_id GROUP BY T1.order_id HAVING count(*)  >  3;