SQL> ed
Wrote file afiedt.buf

  1  with RS as
  2  (
  3    select 0 G, 0 V, 0 I from DUAL where 0=1
  4    union all select 10, 0, 11 from dual
  5    union all select 10, 0, 12 from dual
  6    union all select 10, 3, 13 from dual
  7    union all select 10, 1, 14 from dual
  8    union all select 10, 6, 15 from dual
  9    union all select 20, 2, 21 from dual
 10    union all select 20, 3, 22 from dual
 11    union all select 20, 0, 23 from dual
 12    union all select 20, 9, 24 from dual
 13    union all select 20, 9, 25 from dual
 14  )
 15  select G, count(*) as CNT, min(V) as MIN, max(V) as MAX
 16  , min(I) keep (dense_rank first order by V) as F1
 17  , max(I) keep (dense_rank first order by V) as F2
 18  , min(I) keep (dense_rank last  order by V) as L1
 19  , max(I) keep (dense_rank last  order by V) as L2
 20  from RS
 21* group by G
SQL> /

         G        CNT        MIN        MAX         F1         F2         L1         L2
---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
        10          5          0          6         11         12         15         15
        20          5          0          9         23         23         24         25