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title: 第六章 表的创建与管理 | ||
priority: 2 | ||
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# 表的创建与管理 | ||
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表是数据库的对象,在诸多的对象中,最重要的就是表 | ||
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## 表的基本概念 | ||
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表是由数据按一定的顺序和格式构成的数据集合,是组成数据库的基本元素。 | ||
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### 表结构 | ||
- 组成表的各列的名称及数据类型,统称为表结构 | ||
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### 外键 | ||
- 不是当前表的主键 | ||
- 参照了其他表的主键列/与其他表的主键列相对应 | ||
- 他就是当前表的外键 |
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title: 第六章 表的创建与管理 | ||
priority: 1 | ||
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