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Reviewing SQL and numbers
So you think you can count
12. Getting rid of division by 0
Round and other functions
Review and practice

## Instruction

Oops! As you can see, the error occurs even if there is a single row with a 0 value in the denominator. How can we deal with this? There are a few ways to solve the problem.

For now, you can use the good old WHERE clause to filter out those rows which contain a 0:

...
WHERE column_name != 0;


You'll get to know other methods of dealing with division by zero in further parts of our course.

## Exercise

For each character, show its name and try to divide its mp by its wisdom. Filter out rows with 0 wisdom points. Name the second column ratio.

### Stuck? Here's a hint!

Use:

CAST(mp AS numeric)