How to find performance issues in SQL query

A practical guide to identifying and fixing SQL query performance issues using the EXPLAIN command and database indexing. The tutorial demonstrates how to analyze a complex query with multiple joins and subqueries, use AI tools to interpret query execution plans, and implement indexes to dramatically reduce query costs from 10,000 to 29. Key techniques include enabling ORM logging to capture raw SQL, using database tools to run EXPLAIN statements, and strategically adding indexes on foreign keys and frequently queried columns.