# Find users who have never had a session using a LEFT JOIN and NULL check

Canonical URL: <https://datadriven.io/problems/find-users-who-have-never-had-a-session-using-a-left-join-an-436f53dc>

Domain: SQL · Difficulty: medium

## Problem

Find users who have never had a session using a LEFT JOIN and NULL check

## Related

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