sql - SQL Server 2008 - 枢轴

Question

create table [temp](
[id] [nvarchar](10) not null,
[name] [nvarchar](50) not null,
[info1] [nvarchar](50) not null,
[info2] [nvarchar](50) not null,
[info3] [nvarchar](50) not null);

insert into temp(id,name,info1,info2,info3) values ('id1','name1','infoa','infob','infoc');
insert into temp(id,name,info1,info2,info3) values ('id1','name1','infox','infod','infoc');
insert into temp(id,name,info1,info2,info3) values ('id1','name1','infoz','infob','infoc');

表如下

temp table  
id         name   info1     info2     info3  
id1        name1  infoa     infob     infoc  
id1        name1  infox     infod     infoc  
id1        name1  infoy     infob     infoc  

临时表中的多行将按 id、name 分组，所有唯一信息列将连接预期输出

 id   name    info1              info2         info3  
 id1  name1   infoa;infox;infoy  infob;infod   infoc  

Answer 1

select [id],[name],
    stuff((select distinct ',' + CAST(t2.[info1] as varchar(10))
     from [temp] t2 where t1.id = t2.id and t1.name = t2.name
     for xml path('')),1,1,'') info1,
     stuff((select distinct ',' + CAST(t3.[info2] as varchar(10))
     from [temp] t3 where t1.id = t3.id and t1.name = t3.name
     for xml path('')),1,1,'') info2,
     stuff((select distinct ',' + CAST(t4.[info3] as varchar(10))
     from [temp] t4 where t1.id = t4.id and t1.name = t4.name
     for xml path('')),1,1,'') info3
from [temp] t1
group by id,Name

使用的功能

1. 东西
2. 对于 XML
3. 通过...分组