是否有很好的资源为共同/标准实体寻找模式? 我通常想在我的数据库中确定一些实体,如地址、公司等。 现在,我需要考虑哪些领域需要,哪类、什么规模等等。 成千上万的人过去曾经有过同样的问题并解决了这个问题。 因此,我完全相信,我可以找到某些地方的保存模式(即JPA实体)。 任何想法?
成就
是否有很好的资源为共同/标准实体寻找模式? 我通常想在我的数据库中确定一些实体,如地址、公司等。 现在,我需要考虑哪些领域需要,哪类、什么规模等等。 成千上万的人过去曾经有过同样的问题并解决了这个问题。 因此,我完全相信,我可以找到某些地方的保存模式(即JPA实体)。 任何想法?
成就
我喜欢数据库回答。 关于我不熟悉的主题事项的概念模式。
我不认为你所看到的模式是你所期望的。 但是,它们将显示数据库管理员认为相关的实体、关系和属性。 从那以后,你就可以以适合你的方式建立自己的模式。
Just an addition, erdiagrams.com might be a good resource/starting point as well: http://www.erdiagrams.com Most "standard", common entities are mentioned there. Also, the Data Model Resource Book might help: universal data models.
$db_user="root"; $db_host="localhost"; $db_password="root"; $db_name = "fayer"; $conn = mysqli_connect($db_host,$db_user,$db_password,$db_name) or die ("couldn t connect to server"); // perform query ...
I am in the early stages of developing a database-driven system and the largest part of the system revolves around an inheritance type of relationship. There is a parent entity with about 10 columns ...
I m writing a Java web app in my free time to learn more about development. I m using the Stripes framework and eventually intend to use hibernate and MySQL For the moment, whilst creating the pages ...
Does anybody know if it is possible to move some (not all) users from one ASP.NET membership database to another? (for the purposes of migrating some users to another database on another machine, but ...
Is it because of size? By the way, what is the limit of the size?
I am trying to join two tables that reside in two different databases. Every time, I try to join I get the following error: An association from the table xxx refers to an unmapped class. If the ...
For example, I have a table, and there is a column named Tags . I want to know if value programming exists in this column. How can I do this in ADO.NET? I did this: OleDbCommand cmd = new ...
I m trying to migrate one of my PHP projects to Doctrine. I ve never used it before so there are a few things I don t understand. In my current code, I have a class similar to this: class ...