title: Pandas - Check if any column is date time and change it to date format string (yyyy-mm-dd)
body: <p>How can we use pandas to check, if any column is a datetime datatype column and then convert only that column to a date format string (yyyy-mm-dd) datatype column.</p>
  
  <p>I have multiple columns that are datetime. So, I cannot go by column name and change it. But would rather prefer a way that checks and then changes it.</p>
  
  <p>Kindly help me with this.</p>