Mida mõistetakse SQL-päringute analüüsi ja optimeerimise tööriistade all?

Tools for analyzing and optimizing SQL queries are programs and means that help understand exactly how the database executes queries and identify bottlenecks in their operation. They allow viewing the execution plan of the query, execution time, index and resource usage.

Examples of such tools:

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

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