2.數據模型——數據系統的核心與基礎

原創 weixin_38095675 2020-06-16 02:01

數據模型：對現實世界數據特徵的抽象，通俗講是對現實世界的模擬。

數據模型應滿足3方面的要求：

（1）可真實的模擬現實世界

（2）可人爲理解

（3）便於在計算機上實現

 

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