you need unpivot for this, take a look at the example in this link please.
http://msdn.microsoft.com/en-us/library/ms177410.aspx
Just in case if you need the query,
create table #t
( A int , B int ,c int )
insert into #t Values-- we need to insert only one row
(1,2,3)
Select Val FROM
(Select A,B,C from #t) P
UNPIVOT (Val FOR val1 in (A,B,C)) unpvt
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