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数据库建模-ER图里的属性是由什么决定的?

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Release： 2016-06-06 09:38:40
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数据库建模mysqloracle数据库

图片说明
例如上面的ER图,里面的属性是通过调查决定的,还是通过多年经验积累所得到的模版决定的?

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数据库建模 mysql oracle 数据库
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