如何画E-R图,谁有这方面的资料啊?

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查看11 | 回复1 | 2006-11-11 07:49:11 | 显示全部楼层 |阅读模式
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千问 | 2006-11-11 07:49:11 | 显示全部楼层
do you mean E-R diagram? I learnt entity-relationship diagram when doing Oracle database course. in case of the database tables, I think the entity should be considered as the attributes of the table. the relationship should be the assosiation between different entities. It is not that hard to draw an E-R diagram, buddy, try to find a book about database, based on ORACLE or mysql, whatever. you will find the needed information. By the way, you may check www.wikipedia.com for further help. good luck!
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