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Data & Analytics · Free

SQL Doctor

Diagnose SQL correctness, performance and maintainability with dialect-aware, evidence-led recommendations.

Works withChatGPTClaude

Version 1.0.0

Use it for

  • Fix a slow or wrong SQL query.
  • Understand an execution plan or database error.

What you get

  • The likely cause, with how confident it is.
  • A corrected query with its assumptions stated.
  • Index trade-offs and steps to validate the fix safely.

A place to start

Example requests

Review a PostgreSQL query that regressed from 80 ms to 9 seconds; I will provide EXPLAIN output.

Review my SQL Doctor output for gaps and unsafe assumptions.

Connect and use

This free tool is a set of written instructions, a checklist and a template that guide your AI assistant through the job. It works in any assistant and never calls our servers.

  1. Choose Copy instructions above, or view them first.
  2. ChatGPT or Claude: create a Project and paste them into the project instructions, so every chat in that project uses this tool. Or paste them at the start of a single chat.
  3. Ask your question or use an example request, and add the details it asks for.