SET @query = 'select * into #m from (select [class],[name], [num] from #t ) as T
              Pivot(sum([num]) for [name] in (' + @c + ')) as PVT' 
SET @query = @query + ' SELECT * FROM #m'      

Class                   А       B       C       D
0.00005-0.00100	        NULL	1	NULL	NULL
0.00100-0.00500	        1	NULL	NULL	NULL
0.01000-0.50000  	NULL	1	1	NULL
10.00000-50.00000	NULL	2	NULL	1

CREATE TABLE #RESULT(A int null, B int null, C int null, D int null)

SET @query = 'INSERT INTO #RESULT(A, B, C, D)
select isnull(A,0) A, isnull(B,0) B, isnull(C,0) C, isnull(D,0) D
from ...' 

exec (@query)

select * from #RESULT