These formal definitions are taken from the book by Chris J. Date: An Introduction to Database Systems Volume 1 4th edition, © 1996, Addison-Wesley Publishing Co., Inc., Reading, Massachusetts.

First Normal Form

‘A relation R is in first normal form (1NF) if and only if all underlying domains contain atomic values only.’

Second Normal Form

‘A relation R is in second normal form (2NF) if and only if it is in 1NF and every nonkey attribute is fully dependent on the primary key.’

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I refuse to sleep, and enjoy the peaceful deep night.

Don’t go back to sleep
Originally uploaded by CATeyes.

Finally I finished the following Rook and Knight.

Knig                                            Rook

Today, by some miracle, I was extremly interested in modeling with 3D max, and I miss the time we spent together on those 3D models for our CPU team. I followed the tutorial inside the software and finally built the following two chess models.

Bishop (more…)

最近的无聊, 让人很郁闷啊~~~ 所以那天再bt之家上找到了个模拟类的游戏, 猎杀潜航3, 开始不是很喜欢 因为太麻烦了~~ 但我看了教学视频后,我很是兴奋啊, 居然这么的有意思, 今天大家就随着我的出航来 体验下这个很不错的游戏吧!

先给大家几副图撒~~ 呵呵

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很多人说XP home edition是“太监版”的，不能装IIS、不能装Microsoft Sql Server、没有网络ID等等，其实在中国的盗版市场中根本就没有XP home edition，只有预装的正版的XP home edition。我也是出于无赖，一直用的XP home edition，受到了很多限制，不过还好1年已经挺过来了。但是最近学习sql server，出于无赖下了个“微软虚拟计算机2004”（Microsoft Virtual PC 2004），想在上面装个服务器版的Windows 2000，然后装sql server。没想到竟然成功了。

	首先下载Microsoft Virtual PC 2004（现在微软已经把它弄成免费的了）
	然后安装。安装的时候，软件会提示“本软件只能在Windows XP Professional, Windows 2000 Professional上安装并运行”，不管提示继续安装就是了。（这绝对是个骗局，你想嘛：如果在home上能运行professional老，那微软还怎么卖professional） 呵呵安装好以后就启动程序，然后点”New”并按照提示配置一台虚拟计算机。
	然后把系统的安装盘塞到光驱里，并启动你的虚拟计算机，然后你就会看到”Press any key to start from cdrom”等熟悉的画面。 左边这附图是我安装完2000后的画面
	启动Windows 2000 Advanced Server咯
	两个世界中的GuiGuan.net