select productline, P.productcode, productname, (OD.priceeach - P.buyprice) as ProfitMargin
from Products P, OrderDetails OD
where P.productcode = OD.productcode and productline like '%Cars%'
order by ProfitMargin desc
当我运行它时,出现错误。它说“参数太少。预计1。” 我的代码有什么问题吗?