--测试数据
declare @tab table(id varchar(3),class varchar(10),sums int)
insert @tab
select '001','计算机','65' union all
select '002','计算机','75' union all
select '001','美术','77' union all
select '003','体育','54' union all
select '004','美术','65' union all
select '005','体育','55' union all
select '001','体育','56' union all
select '002','体育','88' union all
select '002','美术','98' union all
select '003','计算机','82' union all
select '003','美术','92' union all
select '004','计算机','85' union all
select '004','体育','25' union all
select '005','计算机','89' union all
select '005','美术','99';
--select * from @tab
--下面是测试代码
select * into #temp1 from @tab
declare @str varchar(8000)
set @str='select id as 编号,'
select @str=@str+'
sum(case class when'''+class+'''then sums else 0 end) as'''+class+'成绩'+''','
from (select distinct class from #temp1)t
set @str=left(@str,len(@str)-1)+' from #temp1 group by id'
exec(@str)
drop table #temp1
/* 下面是测试结果
（所影响的行数为 15 行）
（所影响的行数为 15 行）
编号 计算机成绩 美术成绩 体育成绩
---- ----------- ----------- -----------
001 65 77 56
002 75 98 88
003 82 92 54
004 85 65 25
005 89 99 55 */