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Introduction
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Boolean
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Summary

## Instruction

As you can see, all the calculations seem correct now. That's good news for us.

## Exercise

Okay! Let's go back to our table body and our Thumbelina problem. We changed the columns types to decimal. Again, select height, weight and calculate the third column expected_zero in the following way: height - weight - height + weight. The user_id for Thumbelina is 6. Will this calculation equal zero now? Let's find out!

### Stuck? Here's a hint!

Type

SELECT height, weight,
height - weight - height + weight AS expected_zero
FROM body
WHERE user_id = 6;