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Update 数据库基础知识.md #1361

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4 changes: 2 additions & 2 deletions docs/database/数据库基础知识.md
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Expand Up @@ -28,7 +28,7 @@

## 什么是 ER 图？

> 我们做一个项目的时候一定要试着花 ER 图来捋清数据库设计，这个也是面试官问你项目的时候经常会被问道的。
> 我们做一个项目的时候一定要试着画 ER 图来捋清数据库设计，这个也是面试官问你项目的时候经常会被问道的。

**E-R 图**也称实体-联系图(Entity Relationship Diagram)，提供了表示实体类型、属性和联系的方法，用来描述现实世界的概念模型。 它是描述现实世界关系概念模型的有效方法。 是表示概念关系模型的一种方式。

Expand Down Expand Up @@ -115,4 +115,4 @@ truncate 和 drop 属于 DDL(数据定义语言)语句，操作立即生效，

- <https://blog.csdn.net/rl529014/article/details/48391465>
- <https://www.zhihu.com/question/24696366/answer/29189700>
- <https://blog.csdn.net/bieleyang/article/details/77149954>
- <https://blog.csdn.net/bieleyang/article/details/77149954>