Open MySQL Workbench. In the home screen click 'Create EER Model From Existing Database'. We are doing this for the case that we have already made the data base and now we want to make an ER diagram of that database. Then you will see the 'Reverse Engineer Database' dialouge. Here if you are asked for the password, provided the admin password. Do not get confused here with the windows password. Here you need to provide the MySQL admin password. Then click on Next. In the next dialouge box, you'll see that the connection to DBMS is started and schema is revrieved from Database. Go next. Now Select the Schema you created earlier. It is the table you want to create the ER diagram of. Click Next and go to Select Objects menu. Here you can click on 'Show Filter' to use the selected Table Objects in the diagram. You can both add and remove tables here.Then click on Execute.

6.当您点击Next和Finish时，所需的ER图就会出现在屏幕上。

Open MySQL Workbench. In the home screen click 'Create EER Model From Existing Database'. We are doing this for the case that we have already made the data base and now we want to make an ER diagram of that database. Then you will see the 'Reverse Engineer Database' dialouge. Here if you are asked for the password, provided the admin password. Do not get confused here with the windows password. Here you need to provide the MySQL admin password. Then click on Next. In the next dialouge box, you'll see that the connection to DBMS is started and schema is revrieved from Database. Go next. Now Select the Schema you created earlier. It is the table you want to create the ER diagram of. Click Next and go to Select Objects menu. Here you can click on 'Show Filter' to use the selected Table Objects in the diagram. You can both add and remove tables here.Then click on Execute.

6.当您点击Next和Finish时，所需的ER图就会出现在屏幕上。

从https://www.dbvis.com/download/10.0下载DbVisualizer

安装完成后，创建数据库连接:

通过单击ping服务器更改数据库的高亮显示细节和测试。最后点击连接

享受。

我使用DrawERD为ERD和DB文件。https://drawerd.com

另一种选择是使用Oracle SQL Developer。分为以下两步:

首先，你需要将SQL Developer连接到PostgreSQL数据库。

然后你可以使用SQL Developer生成一个实体-关系(ER)图

ERBuilder可以从PostgreSQL数据库生成ER图(反向工程特性)。

生成ER图的步骤如下:

•点击菜单->文件->逆向工程

•点击新建连接

•填写PostgresSQL连接信息

•点击确定

•点击“下一步”

•选择你想要逆向工程的对象(表，触发器，序列.....)。

•点击下一步。

如果您使用的是试用版，则会显示您的ERD 自动。 如果你使用的是免费版，你需要拖动 并从应用程序左侧的树视图中删除表