title: How do I select users that have not had their score updated within the last 2 hours or at all using Mysql
body: <p>I have the following 2 tables...</p>
  
  <p><strong>users</strong></p>
  
  <pre><code>user_id, name, age
  </code></pre>
  
  <p><strong>user_score</strong></p>
  
  <pre><code>score_id, user_id, score, date(timestamp)
  </code></pre>
  
  <p>The user_score table should keep a log of all scores for all users updated every 2 hours.</p>
  
  <p>So I need to get a list of all user ids that have not had their score updated in the last 2 hours or at all (for new players). I'm guessing I will have to use INNER JOIN?</p>
  
  <p>Any help would be greatly appreciated.</p>