title: split string inside column into new columns
body: <p>as you can see in the following picture I have a column with strings inside which differ in length. I would like to split them into 3 new columns and drop the original after doing so.</p>
  
  <p><a href="https://i.stack.imgur.com/rI2kP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rI2kP.png" alt="Postgis"></a></p>
  
  <p>For example it should look like this in the end:</p>
  
  <pre><code>--------------------------------------------------------------------
  PLZ (Col1)         Area (Col2)               Name (Col3)
  019333             Ostallgäu                 mtb-auerberg-marathon
  013389             Gemeinde Schleching       Mountainbikeweg zur Daiseralm
  ...                ...                       ...
  </code></pre>
  
  <p>Between the first and second part, the slash has no space, but before the last part there is two.</p>
  
  <p>Thanks for the help.</p>