What is the purpose of the EXPLAIN operator when working with a database?

The EXPLAIN operator is used for analyzing and optimizing database queries. It shows the execution plan of an SQL query, helping to understand how the DBMS will process the query:

• Which indexes will be used.
• The order of table joins.
• Cost estimates and row counts.
• Types of operations (e.g., sequential scan, index search).

This helps identify bottlenecks and optimize queries for better performance.

Example of usage in SQL:

EXPLAIN SELECT * FROM Orders WHERE CustomerID = 123;

In Java, when working with a database via JDBC, you can execute an EXPLAIN query and analyze the result to improve queries and database structure.