title: Split a string in characters SQL
body: <p>How can I split a string in characters and add a new line after each character in PostgreSQL</p>
  
  <p>For example</p>
  
  <pre><code>num  desc
   1    Hello
   2    Bye
  
  num  desc
   1    H
        e
        l
        l
        o
  
   2    B
        y 
        e
  </code></pre>