title: Convert data source from string to Date in Tableau
body: <p>I have a string format like this example</p>
  
  <p><strong>60617</strong></p>
  
  <p>this means date "6 June 2017"
  i want to convert my data in column tableau data source but this return "null"</p>
  
  <p>i want it result become data like
  <strong>6/06/2017</strong></p>
  
  <p>is there any other step beside klick the data type in the screen data source?
  Thankyou</p>