# 方法一 /*select cust_id,order_date from OrderItems oi,Orders o where oi.order_num=o.order_num and prod_id='BR01' order by order_date;*/ # 方法二 /*select cust_id,order_date from OrderItems oi join Orders o on oi.order_num=o.order_num where prod_id='BR01' order by order_date;*/ # 方法三 select cust_id,orde...