Oracle: how to page / paging result in select

Paging in Oracle is not as easy as one could think.
If you would like your query to return lets say 100 rows with the start at row 1300:

select * from (
  select rowum as rn, b.*
    from (select a.columnName1, a.columnName2
            from tableName a
           order by a.columnName1) b
        ) c
    where c.rn between 1300 and 1300 + 100