Select * , CASE
    when a > b THEN b = c
    when c > d THEN d = c
    when e > f THEN f = e
    when g > h THEN h = g
    when i > j THEN j = i
    when k > l THEN l = k
    when m > n THEN n = m
    when o > p THEN p = o

END as value
INTO #temptable
From #atemptable