How to Visualize your database schema using StackRender
Inheriting a massive, complex database with zero documentation is every developer’s nightmare. Trying to trace relationships across dozens of foreign keys, join tables, and implicit constraints inside standard DDL scripts isn't just exhausting—it wastes valuable development time.
Even when building a system from scratch, visualizing your architecture solely through code makes it easy to lose sight of the bigger picture.
The fastest way to understand any database architecture is to map it out visually. In this guide, we’ll look at how to convert SQL to ER Diagram (ERD) automatically using StackRender. Whether you are using PostgreSQL, MySQL, MariaDB, SQLite, MSSQL, or Oracle, you can turn raw DDL code into an interactive SQL to ERD layout in just a few clicks.
While StackRender supports all major dialects (MySQL, MariaDB, SQLite, MSSQL, and Oracle), we will focus on PostgreSQL for this example.
Here is the three-step process to generate your SQL to ERD:
Ensure you have the standard PostgreSQL client utilities installed on your system. This includes the pg_dump CLI tool, which is required to extract your database structural definitions.
Run pg_dump with the --schema-only flag to export your tables, data types, and foreign key constraints without dumping any actual row data:
pg_dump -U [username] -d [database_name] --schema-only -f [output_file.sql]Example:
pg_dump -U root -d example_db --schema-only -f example_db.sqlOpen the generated example_db.sql file, copy its contents, and navigate to File → Import SQL inside the StackRender editor. Paste your raw DDL code and click Import. StackRender will instantly parse the statements and render an interactive SQL to ER Diagram.
Working with Other Database Engines?
While this guide focuses on PostgreSQL, StackRender supports full SQL-to-ERD parsing for all major relational database management systems (RDBMS).
If you are using a different engine, the import process inside StackRender is identical—you simply need the native command or tool to dump your database's schema-only DDL.
Check out our official documentation for step-by-step schema export guides for your specific dialect: