Webform is a Drupal module that can help webmasters create submission forms like survey forms, contest forms, contact us form etc without any custom programming. Usually webform submissions will result in the data being inserted as a new row into table 'webform_submitted_data'. But our client requirement was to update an existing submitted data from the table 'webform_submitted_data'. If you want to know how to update an existing webform submission then continue reading