MySQL基础：使用MySQL Workbench生成ER图

迈不过友情╰ 2023-07-08 09:23 24阅读 0赞

这篇文章介绍一下如何使用MySQL Workbench生成ER图。

# 事前准备 #

*  MySQL： 8.0.11

liumiaocn:~ liumiao$ mysql.server start
    Starting MySQL
    .. SUCCESS! 
    liumiaocn:~ liumiao$ mysql.server status
     SUCCESS! MySQL running (18202)
    liumiaocn:~ liumiao$ 
    liumiaocn:~ liumiao$ 
    liumiaocn:~ liumiao$ mysql -uroot
    ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
    liumiaocn:~ liumiao$ mysql -uroot -p
    Enter password: 
    Welcome to the MySQL monitor.  Commands end with ; or \g.
    Your MySQL connection id is 9
    Server version: 8.0.11 Homebrew
    
    Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
    
    Oracle is a registered trademark of Oracle Corporation and/or its
    affiliates. Other names may be trademarks of their respective
    owners.
    
    Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
    
    mysql>

*  MySQL Workbench：6.3.10 （CE版）  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70]

# 生成ER图 #

生成ER图有多种方式，但是主要都是使用MySQL Workbench中的Database菜单下的Reverse Engineer菜单选项来实现的，可以登录指定的数据库选择此菜单，也可以直接直接使用New Model菜单选项来实现，这里通过直接使用Reverse Engineer菜单项来生成ER图。

## 步骤1: 选择New Model菜单项 ##

打开MySQL Workbench，然后选择Database菜单下的Reverse Engineer菜单项  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 1]  
在随后出现的页面中可以看到如下信息  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 2]  
所以可以看出步骤就是连接选项设定之后，进行数据库的连接，然后选择相应的数据库和反向工程所要设定的内容，最后就会生成ER图的信息了。首先设定连接信息之后点击Continue进行连接,输入数据库密码之后，会自动获取数据库相应的信息为后续的反向工程做准备。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 3]  
点击Continue按钮继续，在接下来的页面中选择相应的数据库  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 4]  
点击Continue即可自动获取反向生成的对象内容  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 5]  
缺省会将所有的内容都进行反向生成，本文示例中仅选择表进行反向生成  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 6]  
点击Execute按钮进行反向生成  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 7]  
点击Continue按钮查看生成的结果。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 8]  
结果中提示在名为sys的schema中反向生成了一个表的内容。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 9]

# 保存 #

点击保存按钮，即可将以MySQL Workbench可以打开的格式将反向生成的结果进行保存。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 10]

# 导出为其他格式文件 #

mwb为后缀的文件需要MySQL Workbench打开，如果希望导出成PDF或者图片格式使用如下菜单选项即可  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 11]

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