title: Redshift, count items in column seperated with comma
body: <p>I have data that a column saved a group of number </p>
  
  <pre><code>|  user   |      col                     |
  | ------- |         -------              |
  | 1       | 3,7,11,25,44,56,77,32,34,55  |
  | 2       | 3,7,25,44,37,89,56,99,103,13 |
  | 1       | 3,10,11,25,44,56,33,32,34,55  |
  </code></pre>
  
  <p>I know I can split part the columns and count but do we have any different way to count the numbers?</p>
  
  <pre><code>|user| new-col | count|
  | -------      | ------- | 
  | 1   | 3      | 2 |
  | 1   | 7      | 1 |
  | 1   | 11     | 2 |
  | 1   | 25     | 2 |
  | 1   | 44     |2  |
  | 1   | 56     |1  |
  | 1   | 77     | 1 |
  | 1   | 32     | 2 |
  </code></pre>