A subquery, also known as an inner query or nested query, is a query nested within another SQL query. Subqueries are often used to retrieve data that will be used in the main query to further filter, ...

The following is an example of a query using Common Table Expression (CTE), as discussed in video 02_01. Task: Re-write the query from video 01_02 that uses a CTE instead of a subquery to yield the ...