title: Storing variable
body: <p>Is there any way in postgresql to store the value of a particular column into a variable. </p>
  
  <p>Eg.</p>
  
  <pre><code>name   | age
         |
  John   | 19
  Phill  | 20
  Palmer | 25
  </code></pre>
  
  <p>I would like to store 25 into a variable I can reference in the future.</p>