sql server 2008 使用 for xml path 实现类似 oracle 的 concat 函数

1. 列出所有数据

select * from test

2. 合并，带有多余的逗号

SELECT name,
(SELECT value+',' FROM test
  WHERE name=A.name
  FOR XML PATH('')) AS StuList
FROM test A

GROUP BY name

3. 最终效果

SELECT B.sName,LEFT(StuList,LEN(StuList)-1) as hobby FROM (
SELECT sName,
(SELECT hobby+',' FROM student
  WHERE sName=A.sName
  FOR XML PATH('')) AS StuList
FROM student A
GROUP BY sName
) B

参考资料：
[1]  灵活运用 SQL SERVER FOR XML PATH. http://www.cnblogs.com/doubleliang/archive/2011/07/06/2098775.html