Table schema:
CREATE TABLE Products (Product_ID VARCHAR, Product_price INTEGER); CREATE TABLE ORDER_ITEMS (Order_ID VARCHAR, Product_ID VARCHAR); CREATE TABLE Customer_Orders (Order_Date VARCHAR, Order_ID VARCHAR)

Question: What are the order dates of orders with price higher than 1000?
SQL: SELECT T1.Order_Date FROM Customer_Orders AS T1 JOIN ORDER_ITEMS AS T2 ON T1.Order_ID = T2.Order_ID JOIN Products AS T3 ON T2.Product_ID = T3.Product_ID WHERE T3.Product_price > 1000