Question

I have following query

SELECT  Cod ,
        MIN(Id) AS id_Min,
        MAX(Id) AS id_Max,
        -- retrieve value in the middle,
        COUNT(*) AS Tot

FROM    Table a ( NOLOCK )        
GROUP BY Cod
HAVING  COUNT(*)=3

how could i retrieve value between min and max as i have done for min and max?

EXAMPLES

Cod      |  Id

Stack       10
Stack       15
Stack       11
Overflow    100
Overflow    120
Overflow    15

Required output

Cod         | Min   | Value_In_The_Middle  |    Max

Stack         10          11                    15
Overflow      15          100                   120

Answer 1

I haven’t tested this but I think this would work

SELECT  Cod ,
        MIN(Id) AS id__Min,
        MAX(Id) AS id_Max,
        SUM(ID)-MAX(Id)-MIN(Id) as id_Middle,
        COUNT(*) AS Tot
FROM    Table a ( NOLOCK )        
GROUP BY Cod
HAVING  COUNT(*)=3

This trick only works when you have 3 values and the SUM() doesn’t overflow (like Bogdan Sahlean points out in the comments).