title: How to remove elements of array in PostgreSQL?
body: <p>Is it possible to remove <strong>multiple</strong> elements from an array? 
  Before removing elements Array1 is :  </p>
  
  <pre><code>{1,2,3,4}
  </code></pre>
  
  <p>Array2 that contains some elements I wish to remove:</p>
  
  <pre><code>{1,4}
  </code></pre>
  
  <p>And I want to get:</p>
  
  <pre><code> {2,3}
  </code></pre>
  
  <p>How to operate?</p>