ERwin

ERwin Data Modeler 建模实践:
http://blog.csdn.net/CS_xx_DN/archive/2009/12/15/5011397.aspx

ERwin的简单使用笔记:
http://hi.baidu.com/ak456/blog/item/d9953bf50e3b2225bd3109e7.html

适用于对ERwin初学者使用:
http://wenku.baidu.com/view/33a09f3610661ed9ad51f38a.html


关于erwin连oracle时报 “ORA-00942: Table or view does not exist”:
Title:  Oracle ORA-00942 messages and AllFusion ERwin Data Modeler
http://supportconnect.ca.com/sc/kb/techdetail.jsp?searchID=TEC339989&docid=339989&bypass=yes&fromscreen=kbresults


Identifying and Non Identifying Relationships的区别:
标识关系:
        把实体1中的主键作为实体2中的外键,且作为实体2的主键。

非标识关系:
        把实体1中的主键作为实体2中的外键,但不作为实体2的主键。
Identifying and Non Identifying Relationships:
http://www.gc.maricopa.edu/business/sylvester/cis164/er2b.htm


表间列复制:
Copy the column(s) from one table to another (ERwin 7.x). Highlight the column in the table you want to copy from, holding the 'CTRL' key down while dragging it to the new table. The comment will copy with all of the other column info.
http://www.sqlservercentral.com/Forums/Topic874772-149-1.aspx

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