在XQuery内执行联接以显示每个产品的名称，因为采购订单仅存储产品ID、价格和数量。
A join is performed inside the XQuery to show the name of each product, since the purchase order only stores product id, price, and quantity.
当采购表单的提交（submisstion）元素触发时，将显示出一个购买订单。
When the procurement submission activates, a purchase order displays.
当采购表单的提交（submisstion）元素触发时，将显示出一个购买订单。
When the procurement submission activates, a purchase order displays.
应用推荐