Select column, but group rows inside that column first

Question

Hi,
I have a scenario where I want to show data from a column, but the column has multiple entries of the 'same' entry.
id company
1 burger_king
2 mcdonalds
3 mcdonalds_east
4 diary_queen
5 mcdonalds_west
I want to be able to show all companies but group the mcdonalds companies.
Any suggestions on how to do that?
Thanks.

Answer 1

Here's a funky way (if I haven't misread the requirement):
SQL> -- generating sample data:
SQL> with t as (
  2  select 1 id, 'burger_king' company from dual union
  3  select 2, 'mcdonalds' from dual union
  4  select 3, 'mcdonalds_east' from dual union
  5  select 4, 'diary_queen' from dual union
  6  select 5, 'mcdonalds_west' from dual
  7  )
  8  --
  9  -- actual query:
10  --
11  select id
12  ,     company
13  from  ( select id
14          ,      company
15          ,      row_number() over (partition by soundex(company) order by id) rn
16          from   t
17        )
18  where rn = 1;
        ID COMPANY
         1 burger_king
         4 diary_queen
         2 mcdonalds
3 rows selected.