title: Order by a first column and then order by a second one
body: <p>I have a table like this:</p>
  
  <pre><code>Age | Points
  -------
  22  | 5000   
  15  | 100
  22  | 45
  14  | 50
  13  | 10
  12  | 500
  11  | 356
  15  | 25
  </code></pre>
  
  <p>And I like a result like this (first I order table by age and then for each age I order by points):</p>
  
  <pre><code>Age | Points
  -------
  22  | 5000 
  22  | 45
  15  | 100
  15  | 25
  14  | 50
  13  | 10
  12  | 500
  11  | 356
  </code></pre>
  
  <p>How can I do it through SQL?</p>