title: Convert each character in a string to a row
body: <p>I have a column which contains a String with numbers like '12345' (no separator or blanks) and I want to split this column to rows for each character:</p>
  
  <p>From:</p>
  
  <pre><code> COLUMN
   ------------------
   12345
  </code></pre>
  
  <p>To:</p>
  
  <pre><code> COLUMN
   ------------------
   1
   2
   3
   4
   5
  </code></pre>
  
  <p>This Should work in a single select so that I can use it like this:</p>
  
  <p>... AND WHERE SOMECOLUMN NOT LIKE (<strong>... THE SELECT ...</strong>)</p>