# Count the total number of users and how many have an email address on file (non-NULL email).

Canonical URL: <https://datadriven.io/problems/count-the-total-number-of-users-and-how-many-have-an-email-a-01e81c77>

Domain: SQL · Difficulty: medium

## Problem

Count the total number of users and how many have an email address on file (non-NULL email).

## Related

- [All practice problems](https://datadriven.io/problems)
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