Query optimization

Query optimization is the work of making database queries return results faster and use fewer resources. It usually starts with analyzing the execution plan — the database's step-by-step strategy for a query — to find slow operations like full table scans.

Common fixes include adding or reshaping indexes, rewriting inefficient queries, and improving the schema. A single well-placed index can turn an eight-second report into a sub-second one, speeding up everything built on the database.