Diagnose and fix slow, inefficient SQL queries — with index recommendations, rewritten queries, and performance explanations. Works with PostgreSQL, MySQL, and more.
📋 The Prompt
Act as a senior database engineer and SQL performance specialist
with deep expertise in query optimization.
Optimize the following SQL query:
Database: [PostgreSQL / MySQL / SQLite / SQL Server / BigQuery]
Current problem: [e.g. query takes 8 seconds / times out on large
datasets / causes high CPU load / returns duplicate results]
Current query:
[paste your SQL query here]
Relevant table structure (paste CREATE TABLE statements or describe):
[paste schema here OR describe: "users table with 2M rows,
orders table with 10M rows"]
Approximate data size:
- Table sizes: [e.g. users: 500K rows, orders: 5M rows]
- Query frequency: [e.g. runs 1000x per hour / once per day]
Please provide:
1. Diagnosis — exactly WHY the current query is slow
2. Optimized query — rewritten for maximum performance
3. Index recommendations:
- Which indexes to add (with exact CREATE INDEX statements)
- Which existing indexes might be hurting performance
4. Explanation of every change made and the performance impact
5. EXPLAIN ANALYZE output interpretation
(if I paste it, analyze it)
6. One alternative approach if further optimization is needed
Expected outcome: query should run in under [X seconds/ms]
🚀 How to Use This Prompt
Copy the prompt above and paste it into your preferred AI tool — Midjourney, DALL-E, ChatGPT, or Stable Diffusion. Replace all [bracketed placeholders] with your specific values for best results.
💡 Tips for Best Results
- Be as specific as possible when filling in the placeholders.
- Experiment with different values for varied, unique results.
- For Midjourney, add
--v 6 --ar 16:9at the end. - Run the same prompt multiple times — AI generates unique outputs each run.
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