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Introduction
FIRST_VALUE, LAST_VALUE, NTH_VALUE
20. LAST_VALUE(x) with different sorting
Summary

## Instruction

Great! Let's do one more exercise

## Exercise

For each statistics rows with website_id = 1, show the day, the number of users, the number of users on the last day and the difference between these two values.

### Stuck? Here's a hint!

Use LAST_VALUE(users), but sort by the day.