SQL Query to find SUM elimating MAX n and MIN n values

Question

Dear Gurus,
I am currently looking for a query which will provide the sum of a column eliminating the MAX n and MIN n values.
For Example,
If I have 7 values, and if n = 2, then the sum would be (23+26+36), if n = 1 then sum (14+23+26+36+39) and n will be always lesser than total no of values / 2.
12
14
23
26
36
39
45
Note: working in oracle 10g version

Answer 1

try this
with t as
(select 12 col from dual union all
select  14  col from dual union all
select  23  col from dual union all
select  26  col from dual union all
select  36  col from dual union all
select  39  col from dual union all
select  45  col from dual
select sum(col) from
  select col,rn from
    (select col, rownum rn from  (select col from t order by col))
  where rn > (select &n from dual) and rn <= (select count(*) from t) - &n
)also
with t as
(select 12 col from dual union all
select  14  col from dual union all
select  2  col from dual union all
select  26  col from dual union all
select  36  col from dual union all
select  3  col from dual union all
select  4  col from dual
select sum(col) from
  select col
    , row_number() over (order by col) rn
  from t
where rn > (select &n from dual) and rn <= (select count(*) from t) - &nEdited by: AlexAnd on Apr 27, 2011 12:37 AM