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DATA SCIENCE

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AI Prompt for

SQL query optimization for large datasets

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Optimize a slow-running SQL query on a 50M+ row table. Techniques to apply: 1. Add appropriate indexes on WHERE and JOIN columns. 2. Replace subqueries with CTEs (Common Table Expressions). 3. Use EXPLAIN ANALYZE to identify bottlenecks. 4. Partition large tables by date for faster scans. 5. Rewrite correlated subqueries as window functions. Provide before/after execution times and explain each optimization decision.

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