How to group by with a special condition

Question

Currently when I issue this SQL, it gets the distinct username.

I have some distinct usernames, which represent groups, e.g. GRP_BSN.

I would li

Answer 1

If you wanted to do it by putting small groups into one bucket, instead of by a particular name pattern, you could use:

select (case when cnt > 100 then username else 'OTHER' end), sum(cnt) as cnt
from (select username, count(*) as cnt
      from host
      where seq between 0 and 2000
      group by username
     ) t
group by (case when cnt > 100 then username else 'OTHER' end)