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Introduction
1. Introduction
Quiz
The End

## Instruction

Welcome! In this part, you'll get a chance to check how much you've learned throughout our GROUP BY extensions course.

You will be presented with five questions covering several of the topics you learned in this course.

When in doubt, you can always take a look at the hints we've prepared. If they aren't enough, feel free to revisit the previous parts of the course and do a thorough preview.

Good luck, and have fun!

## Exercise

Click to continue.