Master SQL for Data Analysis - Conditional Logic – Single Row

The video tutorial explains the concept of subqueries in SQL, focusing on their use in filtering data within the WHERE clause. It provides examples of using subqueries to find products with weights greater than the average and those with the maximum price. The tutorial also covers best practices for writing subqueries, such as ensuring they return a single value when using aggregate functions and placing them on the right side of comparison operators. It emphasizes the importance of testing subqueries separately before integrating them into larger queries.

What is the significance of using aggregate functions in subqueries?

Why should you not include an alias when writing a subquery in a conditional statement?

Describe the process of building effective subqueries.