title: Laravel query. Where unique
body: <p><br>
  I got database table like this:</p>
  
  <pre><code>**job_id**
      5
      5
      5
      6
      6
      7
      8
      8
  </code></pre>
  
  <p>I want to write query, which could select only unique id's. By saying unique I mean select only these values once:<br>
  <code>5, 6, 7, 8</code></p>
  
  <p>Thanks in advance!</p>