title: Getting day of week from date column in prestosql?
body: <p>I have a date column called <strong>day</strong> such as <code>2019/07/22</code> if I want to create a custom field that translates that date to the actual day of week it is such as <strong>Sunday</strong> or <strong>Monday</strong> how is this possible? I cant seem to find a method that works for presto sql. </p>
  
  <p>Thanks for looking</p>