有没有可以寻找数据建模灵感的网站？
这是我的问题：我即将在现有的业务（Web）应用程序之上设计和实现一个相当大的销售模块。我需要的基本上是这个 - 一个完整的电子商务层，没有公共部分（我不需要购物车、支付网关等）。我将从头开始构建这个东西，因为我不愿意破坏任何现有的解决方案（我使用 Rails，只是为了完成图片）。我已经思考整个问题有一段时间了，并检查了一些现有的解决方案，以获取有关如何开始数据建模的灵感。我现在对这个模型已经很了解了，但是，我忍不住有一种感觉（至少在某种程度上）我正在这里重新发明轮子。我的意思是，必须有数千个与我的相似（如果不相同）的数据模型。我试图找到其中的一些，但没有取得很大的成功。我想要的不是一个完整的数据库模型，只是一个我可以在做自己的事情时用作清单的逻辑模型。到目前为止我发现的只是这个网站，它更多的是数据库模型的集合，没有任何描述或模型背后的原因。
所以，我的问题是：您知道在哪里可以寻找数据建模灵感的网站吗？
编辑：因为到目前为止，没有一个答案能告诉我我现在的情况寻找，我会尝试完善我的问题。 我不是在寻找任何特定的数据库图表（正如我所提到的，我对其他现有系统的逆向工程不感兴趣），也不需要研究一般数据建模的主题。我正在寻找类似于这本书的在线版本。很难相信外面没有这样的东西。
不管怎样，谢谢大家。
Here's my problem: I'm about to design and implement quite a big sales module on top of an existing business (web) application. What I need is basically this - a complete e-commerce layer without the public part of it (I don't need a cart, payment gateways etc.). I'm going to build this thing from scratch since I'm not willing to hack any of the existing solutions (I'm using Rails, just to complete the picture). I've been thinking about the whole thing for a while and checked some of the existing solutions for inspiration about how to kick-off my data modeling. I'm pretty far with the model now, however, I can't resist to have a feeling that (at least to some extent) I'm reinventing the wheel here. I mean, there have to be thousands of data models out there which are similar (if not identical) to mine. I tried to find some of them but with no great success. What I want is not a complete database model, just a logical model that I can use as a checklist when doing my own thing. What I found so far is just this site which is more of a collection of database models without any description or reasons behind the models at all.
So, my question is: Do you know of any sites where to look for a data modeling inspiration?
EDIT: Since none of the answers so far provided me with what I am looking for, I'll try to refine my question.
I'm not looking for any particular database diagrams (and as I mentioned I'm not interested in reverse-engineering of other existing systems), nor do I need to study the subject of data modeling in general. What I'm looking for is something like an online version of this book. It's just hard to believe there's nothing like that out there.
Thank you all, anyway.
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这个网站之前已经在 stackoverflow 上提到过，并且有很多与系统无关的关系数据库示例。
This site has been mentioned on stackoverflow before, and has lots of relatively systems agnostic relational database examples.
r937.com 有很好的介绍。
r937.com has a good introduction.
领域驱动设计（可在 Google 图书中找到），如果您想要比数据库设计更深入地研究并进入领域的分析和建模。
Domain-Driven Design (found at Google books) if you want to delve deeper than database design and get into analysis and modeling of a domain.
OSCommerce 是一个开源在线商店电子商务解决方案。如果您获得源代码，我想您也会获得数据库创建脚本，这样您就可以研究他们的数据模型。
OSCommerce is an Open Source online shop e-commerce solution. If you get the sources I guess you'll get the db creation scripts as well so you could look into their data model.
也许您可以看看 Apache Ofbiz 项目。它的设计是基于你提到的数据模型资源书。
他们在这里有一个在线演示：http://demo.ofbiz.org/ecommerce/control/main
May be you can have a look at the Apache Ofbiz project. Its design is based on the data model resource book you mention.
They have an online demo here : http://demo.ofbiz.org/ecommerce/control/main