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Slow Query Optimization
Speed up a slow database query.
Updated June 2026
The prompt
Help me optimize this slow SQL query: {{query}}. On a {{db}} database. Identify the likely reasons it is slow (missing indexes, full scans, inefficient joins, subqueries, functions on indexed columns, returning too much data), explain how to read what is happening, recommend specific improvements and indexes with the trade-offs, and provide an optimized version. Explain why each change helps, and note the change likely to give the biggest speedup. Keep correctness identical.
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Author
AI Khazna
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Security
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