title: converting specific string format to date in sparksql
body: <p>I have a column that contains a string with the following date as a string <code>Sat Sep 14 09:54:30 UTC 2019</code>. Not familiar with format at all.</p>
  
  <p>I need to convert to date or timestamp. Just a unit that I can compare against. I just need a point of comparison with a precision of one day.</p>