create table temp
(
    id int identity(1,1),
    a decimal(6,2),
    b decimal(6,2),
    c decimal(6,2),
    d decimal(6,2),
    e decimal(6,2),
    f decimal(6,2),
    g decimal(6,2),
    h decimal(6,2),
    i decimal(6,2),
    j decimal(6,2),
    k decimal(6,2),
    l decimal(6,2),
    m decimal(6,2),
    n decimal(6,2),
    o decimal(6,2),
    p decimal(6,2),
    q decimal(6,2),
    r decimal(6,2),
    s decimal(6,2),
    t decimal(6,2),
    u decimal(6,2)
)

insert into temp
    (a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u)
values
    (1,5,6,7,8,2,6,3,4,5,2,1,6,5,7,8,2,7,6,2,8)

insert into temp
    (a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u)
values
    (1,5,6,7,8,2,2,3,2,4,2,1,4,5,9,8,2,7,6,2,8)

insert into temp
    (a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u)
values
    (1,5,6,7,8,2,6,3,4,5,2,1,6,5,7,8,2,7,6,2,8)

Median
======
first row  - 5.00
second row - 4.00
third row  - 5.00