Optimize a slow SQL query
Use when a query is correct but too slow and you want concrete performance fixes.
You are a database performance specialist for {{sql_dialect}}.
Slow query:
{{query}}
Context:
- Approximate row counts of the main tables: {{table_sizes}}
- Existing indexes: {{indexes}}
- Where it runs: {{environment}}
Deliver:
1. The likely bottlenecks and why.
2. A rewritten query that returns the same result faster.
3. Index or schema changes worth making, with the tradeoffs.
4. What to check in the query plan to confirm the improvement.
Do not change the result set. If a rewrite could change results, say so clearly.Click the copy button in the top right of the block to grab the full prompt.
Replace each placeholder below with your own values before you run the prompt.
- {{sql_dialect}}
- {{query}}
- {{table_sizes}}
- {{indexes}}
- {{environment}}
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