What is meant by tools for analyzing and optimizing SQL queries?

Tools for analyzing and optimizing SQL queries are programs and utilities that help understand how the database executes queries and identify bottlenecks in their performance. They allow you to see the execution plan, execution time, index usage, and resource consumption.

Examples of such tools:

• EXPLAIN or EXPLAIN ANALYZE in PostgreSQL and MySQL — show the query execution plan.
• SQL Server Management Studio (SSMS) — has a built-in query analyzer.
• Profilers and database monitoring tools that collect query statistics.

Using these tools, you can identify, for example, that a query does not use an index, performs a full table scan, or executes unnecessary joins, and based on this, rewrite the query or add indexes to speed up the process.