Master SQL for Data Analysis - Null Values

The video tutorial explains the concept of null values in databases, highlighting their potential to cause errors in data analysis if not handled carefully. It defines null values as the absence of any value in a database column and discusses how databases manage these values based on predefined constraints. The tutorial differentiates null values from zero and spaces, and explains how SQL identifies and stores them. Finally, it emphasizes the importance of learning to handle null values effectively in data analysis projects.

What special marker does SQL use to identify null values?

Why is it important to handle null values carefully in data analysis?