SQL Query Comparer
Format two SQL queries consistently, then see which lines were added, removed, or kept.
How can I compare two SQL queries?
Paste the original and revised queries. The tool formats both with the same dialect and produces a line diff so layout changes are less distracting.
Your result
A little clarity, right here.
Start with your own content or load the example. Your result will appear here.
Three simple steps
How to use SQL Query Comparer
Paste your content or choose a supported file.
Adjust the options, then run the tool.
Review the result and copy or download it.
Common questions
Good to know
Understand the result.
Keep the original.
Is this tool free, and are my files uploaded?
This tool is free with no account required. The work happens in your browser. Your input and files are not sent to a processing server.
What are the limits and details?
This is a text comparison. Similar text does not prove that queries return the same results, and formatting does not execute them.
Limits: 500,000 characters per text field; files up to 20 MB each, 10 files and 50 MB total. Processing stops after 30 seconds.