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Leetfs committed Sep 13, 2024
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### 完整性规则

- 保障了数据**正确、有效、相容**

## 常用的数据模型

### 数据模型的分类

- 层次模型
- 网状模型
- 关系模型

以上三个必背,以下最好记忆

- 面向对象模型
- 对象关系模型

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