There is none in the official documentation. But you can use one of the tools that can generate such an ERD out of an existing installation. https://www.codediesel.com/data/5-tools-to-visualize-database-schemas/
For instance mysql workbench does that job nice and fast for mysql databases.![alt text][1]
Or MsSql server has this feature in the Diagrams section. ![alt text][2]
Here is a generated sample schema for 7.1.17.1.1. Generated with mysql workbench.
![alt text][2]text][3]
[1]: https://answers.axonivy.com/upfiles/mysqlWorkbench_erdReverseEngineering.png
[2]: https://answers.axonivy.com/upfiles/mssql_erdDiagram.png
[3]: https://answers.axonivy.com/upfiles/sysDb_711.png
