Get if field has max value and display value I need to display Y or N when displaying rows in a report based on the max value for them on their version. If they have multiple versions all of them will display 'N' but the max (last version) will display 'Y'.
I have tried with case when and max but always I'm getting 'Y'
case when version = (select max(version) from t_proj_f where version = t.version) then 'Y' else 'N' end Is_last_version

Here is fiddle in case anybody can take a look
http://sqlfiddle.com/#!4/813501/4
I'm new on oracle sql any help is appreciated.
I think this will give you want you want:
 select project_id,
        version,
        stop,
        t_id,
        status,
        mp,
        case when rowno = 1 then 'Y' else 'N' end is_last_version
        from (
              select project_id,
                     version,
                     stop,
                     t_id,
                     status,
                     mp,
                     row_number() over (partition by projecT_id order by version desc) 
                        as rowno
              from t_proj_f t
              order by project_id)