说明：  想做数据库的朋友，那你快来下吧，这是一本好书，希望大家给自己的资源贡献出来，让大家都能共享。这样会推动我们国家的技术提高和流通。
(Database friends want to do that you need, are you, this is a good book, I hope everyone to contribute their own resources, so that everyone can share. This will promote our country s technology to enhance and circulation.)