以一道题来做引子 牛客，SQL30 计算总和 OrderItems表代表订单信息，包括字段：订单号order_num和item_price商品售出价格、quantity商品数量。
I want to start doing web development with Eclipse.Not Java, tomcat, axis2, or anything else anymore complicated than basic XHTML / JS / CSS development, at this time.
加载中,请稍侯......