sql - 行数据到列

Question

我有 sql 查询来获取文件的位置

select FileName, FileLocation from tblFile

和像这样的数据

FileName               FileLocation

file1                  \\server1\folder1\file1
file1                  \\server2\folder1\file1
file2                  \\server1\folder1\file2
file2                  \\server2\folder1\file2

我想获得如下数据：

FileName               FileLocations

file1                  \\server1\folder1\file1, \\server2\folder1\file1
file2                  \\server1\folder1\file2, \\server2\folder1\file2

如何在 sql server 中获得上述结果？

Answer 1

SQL小提琴

MS SQL Server 2008 架构设置：

create table tblFile
(
  FileName varchar(10),
  FileLocation varchar(30)
)

insert into tblFile values
('file1',                  '\\server1\folder1\file1'),
('file1',                  '\\server2\folder1\file1'),
('file2',                  '\\server1\folder1\file2'),
('file2',                  '\\server2\folder1\file2')

查询 1：

select T1.FileName,
       (
       select ', '+T2.FileLocation
       from tblFile as T2
       where T1.FileName = T2.FileName
       for xml path(''), type
       ).value('substring(text()[1], 3)', 'varchar(max)') as FileLocations
from tblFile as T1
group by T1.FileName

结果：

| FILENAME |                                    FILELOCATIONS |
---------------------------------------------------------------
|    file1 | \\server1\folder1\file1, \\server2\folder1\file1 |
|    file2 | \\server1\folder1\file2, \\server2\folder1\file2 |