Introduction
The very basics
8. Basic recursion: exercise
Infinite looping
Processing trees with recursive CTE
Processing graphs with recursive CTE
Summary

## Instruction

Excellent. Let's do an additional exercise to practice.

## Exercise

Create a recursive query that will show three columns:

• num - even numbers from 2 to 20,
• num_plus_prev - that number plus the previous number,
• num_square - the number squared.

### Stuck? Here's a hint!

In order to get squared values, multiply the value by itself.