A subquery in the FROM clause is used to create a temporary table.
This temporary result is also called a derived table.
It can be queried like a normal table.
The subquery executes first and generates a result set.
The outer query then works on this result.
This helps simplify complex logic.
Derived tables are useful when multiple calculations need to be performed before final selection.
They are widely used in advanced reporting.
The subquery creates a temporary dataset.
The outer query selects data from that dataset.
This approach improves readability.
Subqueries in FROM clause are very powerful.
They are commonly used in analytics and reporting systems.
Understanding derived tables is essential for advanced SQL.