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Introduction
1. Introduction
The ISNULL() function
The COALESCE() function
The NULLIF() function
Summary

## Instruction

Welcome to Part 5! In this part, we're going to learn about useful T-SQL functions that deal with NULLs.

You're familiar with NULLs already, of course, but this will extend your knowledge.

Let's go!

## Exercise

Click to continue.