@classmethod
def generate_single_string_sql_eq(cls, column_name, filter_value):
    """Return tuple with sql and replacement.

        This function builds the sql partial and replacement dict for
        an equivalency match for one value against a single column in
        the database.

        Args:
            column_name (str): Name of column in DB.
            filter_value (str): This is what we look for in the column.

        Returns:
            tuple: Item 0 contains the SQL partial string. Item 1 contains
                the replacement dictionary.

        """
    sql = '{} = :{}'.format(column_name, column_name)
    replacement = {column_name: str(filter_value)}
    return sql, replacement
