SQL Performance and Anti Patterns Questions

Recognition and remediation of common SQL performance anti patterns and pitfalls, such as accidental cartesian joins, N plus one query patterns, inefficient correlated subqueries, using functions in WHERE clauses that prevent index use, SELECT star usage, lack of appropriate indexes, large unbounded sorts or aggregations, and poor join ordering. Covers methods to diagnose problems using execution plans, explain analyze, and rewriting queries for better performance and scalability.