Master SQL for Data Analysis - Common Table Expressions (CTEs)

The video tutorial explains Common Table Expressions (CTE) in SQL, highlighting their advantages over subqueries for improving readability and organization of code. It covers the steps to define a CTE, using the 'WITH' keyword, and provides examples of how CTEs can be used in queries. The tutorial also demonstrates using CTEs with user data and window functions to retrieve specific data, such as the top five oldest users.

What is the purpose of using the ROW_NUMBER function in conjunction with a CTE?

How can you retrieve the top five oldest users using a CTE?