What is the usage of explain in PostgreSQL?

In PostgreSQL, EXPLAIN is a command used to display the execution plan of a query. By adding the EXPLAIN keyword before a query statement, PostgreSQL can provide the execution plan of the query without actually executing the query.

Utilizing the EXPLAIN command can assist us in analyzing the execution plan of a query, allowing us to understand how PostgreSQL executes the query. By analyzing the execution plan, we can optimize the query statement and improve query performance.

I have a lot of work to do today.

I have a large amount of tasks to complete today.

EXPLAIN SELECT * FROM users WHERE age > 30;

In the above example, we used the EXPLAIN command to obtain the execution plan of the query SELECT * FROM users WHERE age > 30. The execution plan shows the optimization path of the query, including the indexes used, types of connections made, and data scanning methods. By analyzing this information, we can optimize the query.