CREATE TABLE [Test] (
[id] [int] IDENTITY (1, 1) NOT NULL ,
[name] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[subject] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[Source] [numeric](18, 0) NULL
) ON [PRIMARY]
GO
INSERT INTO [test] ([name],[subject],[Source]) values (N'張三',N'語文',60)
INSERT INTO [test] ([name],[subject],[Source]) values (N'李四',N'數學',70)
INSERT INTO [test] ([name],[subject],[Source]) values (N'王五',N'英語',80)
INSERT INTO [test] ([name],[subject],[Source]) values (N'王五',N'數學',75)
INSERT INTO [test] ([name],[subject],[Source]) values (N'王五',N'語文',57)
INSERT INTO [test] ([name],[subject],[Source]) values (N'李四',N'語文',80)
INSERT INTO [test] ([name],[subject],[Source]) values (N'張三',N'英語',100)
Go
--交叉表語句的實現：
--用於：交叉表的列數是確定的
select name,sum(case subject when '數學' then source else 0 end) as '數學',
sum(case subject when '英語' then source else 0 end) as '英語',
sum(case subject when '語文' then source else 0 end) as '語文'
from test
group by name
--用於：交叉表的列數是不確定的
declare @sql varchar(8000)
set @sql = 'select name,'
select @sql = @sql + 'sum(case subject when '''+subject+'''
then source else 0 end) as '''+subject+''','
from (select distinct subject from test) as a
select @sql = left(@sql,len(@sql)-1) + ' from test group by name'
exec(@sql)
go
--用於：交叉表的列數是不確定的
declare @sql varchar(8000)
set @sql = 'select id,'
select @sql = @sql + '(case subject when '''+subject+'''
then source else null end) as '''+subject+''','
from (select distinct subject from test) as a
select @sql = left(@sql,len(@sql)-1) + ' from test '
exec(@sql)
go
