Introduction
PARTITION BY
Summary
12. Summary

## Instruction

Excellent! Let's review what we've learned in this part:

• OVER(PARTITION BY x) works in a similar way to GROUP BY, defining the window as all the rows in the query result that have the same value in x.
• x can be a single column or multiple columns separated by commas.

Alright. How about a short quiz?

## Exercise

Press to begin the quiz.