Congratulations! You've just learned about non-correlated and correlated subqueries in SQL. What can we generalize so far?

- Subqueries are used to complete an SQL transformation by nesting one query within another query.

- A non-correlated subquery is a subquery that can be run independently of the outer query and can be used to complete a multi-step transformation.

- A correlated subquery is a subquery that cannot be run independently of the outer query. The order of operations in a correlated subquery is as follows:

1. A row is processed in the outer query.

2. Then, for that particular row in the outer query, the subquery is executed.

Community Forums
Get help and ask questions in the Codecademy Forums
Report a Bug
If you see a bug or any other issue with this page, please report it here.