(self)
return []
Returns a list of column names to create the
        DISTINCT ON portion of the SQL query
Returns a list of column names to create the
        DISTINCT ON portion of the SQL query
Returns a list of column names to create the DISTINCT ON portion of the SQL query
def distinct_on(self):
        """
        Returns a list of column names to create the
        DISTINCT ON portion of the SQL query
        """
        return []
def distinct_on ( self ) : return [ ]