Decision Tree

Need query optimization?   → Use EXPLAIN ANALYZE
Need cached aggregations?  → Use Materialized View
Need complex breakdown?    → Use CTEs
Need row ranking?          → Use Window Functions
Need partial coverage?     → Use Partial Index

Reporting & Optimization Guidelines

Reporting queries often scan large datasets. Inefficient queries can degrade the performance of the entire system. Follow these guidelines to ensure speed and stability.

1. Query Optimization

1.1 SELECT Efficiency