Free SQL Tool to Understand Your Database Visually

You might already know how to write basic SQL.
Let’s say you’ve written something like this:

CREATE TABLE customers (
  customer_id INT
);

That’s great, you've created a table. But do you really understand how it looks in the database?

• Is it linked to another table?
• What kind of data goes into that column?
• What happens when you add more fields or relationships?

This is where most people get stuck - you write code, but you don’t see the full picture.

That’s why tools like DbSchema include a free Community Edition, so you can learn faster by seeing how your SQL shapes the database in real time.

1. Real-Time Diagram Updates

As you write or modify SQL code, DbSchema updates the ER diagram automatically.

Instead of scrolling through raw SQL code or switching between tabs, you can see:

• Which table connects to which

• What foreign keys are in place

• How your schema is structured as a whole

This is especially helpful when working with large databases, collaborating in teams, or just trying to get a quick understanding of how everything fits together.

2. Smart Autocomplete & Syntax Highlighting

DbSchema’s SQL editor helps you write better and faster:

• Autocomplete suggestions as you type (table names, columns, commands)
• Syntax highlighting so you can easily spot errors
• Helpful tooltips and validation when something’s off

This reduces typos and lets you focus on logic, not memorization.

3. Explore Your Data Easily

Query results don’t just appear as plain text.
DbSchema shows them in a clean, spreadsheet-style grid.

• Run queries and view results instantly
• Edit data directly in the table
• Sort and filter columns just like in Excel

Perfect for exploring datasets and testing results.

4. Save Results to File

Need to export your query results?

Just click the save button in the result panel.
DbSchema will rerun the query and write the full dataset to a file, even if it's too large to display on screen.

Ideal for:

• Reports
• Data backups
• Sharing with colleagues

5. Instant SQL Generation from Diagrams

Already designed your schema visually?
You don’t have to write the SQL manually.

DbSchema automatically generates the full SQL script for each table or relationship.
You can copy, inspect, or tweak it any time, perfect for learning or reusing structures.

6. Execute Groovy and JavaScript in the SQL Editor

Yes, really - you can run both Groovy and JavaScript right inside the editor.

There’s a drop-down in the SQL editor where you can switch between SQL, Groovy, and JavaScript modes.

You can write scripts to:

• Fetch or manipulate data
• Generate reports or exports
• Automate tasks or workflows using the language you're most comfortable with

DbSchema even includes built-in code samples to help you get started faster, just check the Help menu inside the application.

Conclusion

Most SQL editors just let you type queries.
DbSchema helps you actually understand your database while you write them.

From diagrams to scripts, from autocompletion to real data editing - it’s all built-in.

If you're still learning SQL and want to get more confident,
we’ve also prepared a full SQL tutorial with all the syntax you need:
Learn SQL - The Complete Syntax Guide

Ready to try it yourself?
Download DbSchema Free