很簡單的乙個東西，見網上好多朋友問「怎麼實現交叉表？」，以下是我寫的乙個例子，資料庫基於sql server 2000。
交叉表例項
建表：在查詢分析器裡執行：
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]
goinsert 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) [bitscn.com]
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
ms server的analysis services元件是專門用來做交叉表的處理
microsoft sql server 2000 analysis services
自己製作的過程：
create table allen_test(
id number(8,0) not null ,
name varchar2(30) not null ,
subject varchar2(30) not null ,
source number(8,2) ,
primary key (id)
); comment on column allen_test.id is '序號';
comment on column allen_test.name is '姓名';
comment on column allen_test.subject is '學科';
comment on column allen_test.source is '分數';
insert into allen_test values (1, '張三','語文',60);
insert into allen_test values (2, '李四','數學',70);
insert into allen_test values (3, '王五','英語',80);
insert into allen_test values (4, '王五','數學',75);
insert into allen_test values (5, '王五','語文',57);
insert into allen_test values (6, '李四','語文',80) ;
insert into allen_test values (7, '張三','英語',100);
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 allen_test
group by name;
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