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Introduction
The COALESCE() function
The GREATEST() & LEAST() functions
The NULLIF() function
13. Practice NULLIF() – 1
Summary

## Instruction

Good! Let's do another exercise to practice the use of the NULLIF() function.

## Exercise

Show the name of each product and the ratio column calculated in the following way: the price of each product in relation to its shipping_cost in percent, rounded to an integer value (e.g., 31).

If the shipping cost is 0.00, show NULL instead.

### Stuck? Here's a hint!

Use the ROUND(x) function to get the rounded value.