SQL Visual Debugger is a VS Code extension for stepping through supported MySQL SELECT queries clause by clause and inspecting the intermediate result after each stage. It helps explain how data changes through the query instead of only showing the final output.
I built this because I kept running into SQL queries where the final result looked surprising, but it was hard to understand exactly which part of the query changed the data in that way.
So I made a VS Code extension that lets me step through supported MySQL SELECT queries stage by stage and inspect the intermediate result after each step.
The goal is to make SQL easier to understand and debug when joins, filters, grouping, ordering, or projections behave differently than expected.
It’s currently focused on MySQL and supported SELECT-style flows. I’d really love feedback from people who try it, especially around confusing behavior, unsupported query shapes, and bug reports.
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