说明：  系统中的车辆主要有大客车、小轿车和卡车。每种车辆有车辆编号、车牌号、制造公司、购买时间、型号（大客车、小轿车或卡车）、总公里数、耗油量/公里等。大卡车有载客量，小轿车有箱数（两厢或三厢），卡车由载重量等信息。 设计“车辆管理系统”，使之能提供以下功能： 1）添加车辆； 2）查询车辆：按制造公司查询、按型号查询、按车辆编号查询； 3）车辆信息的删除； 4）车辆信息的修改； 5）车辆统计：如按型号统计等；。
(Vehicle systems are mainly buses, cars and trucks. Each vehicle has a vehicle number, license plate number, manufacturing companies, to buy time, model (buses, cars or trucks), the total number of kilometers, fuel consumption/km and so on. Large trucks have capacity, cars have a number of boxes (hatchback or sedan), by the truck load and other information. Design "vehicle management system", so that it can provide the following functionality: 1) Add a vehicle 2) check vehicle: inquiry by manufacturing companies, according to type queries, by vehicle number inquiry 3) Delete vehicle information 4) changes to vehicle information 5) Vehicle statistics: In terms of models and statistics . )