select *

  from (select 'Nick' as item

          from dual

        union all

        select 'Viki' as item

          from dual

        union all

        select 'Glen' as item

          from dual

        union all

        select 'Robin' as item

          from dual

        union all

        select 'Total' as item from dual) pre_tab

 order by decode(item, 'Viki', 1, 'Glen', 2, 'Robin', 3, 'Nick', 4);