วันที่สั่งของที่มีราคาสูงกว่า 1,000 คือเมื่อใด
What are the order dates of orders with price higher than 1000?
products = pd.DataFrame(columns=['Product_ID', 'Product_price']); order_items = pd.DataFrame(columns=['Order_ID', 'Product_ID']); customer_orders = pd.DataFrame(columns=['Order_Date', 'Order_ID'])
pd.merge(pd.merge(customer_orders, order_items, on='Order_ID'), products, on='Product_ID')[products['Product_price'] > 1000]['Order_Date']