ip库查询，mdb数据库，用的是QQ的。绿色免安装-ip the inquiries, mdb database, using the QQ. Green-free installation

linux下的迷你内存数据库，操作简单，便于使用，源码量小，适于学习-Under linux mini-memory database, simple operation, easy to use, a small amount of source code, suitable for learning