SQL Server 2005 溢用之：合并列值（3）

示例数据 
DECLARE @t TABLE(id int, value varchar(10))

INSERT @t SELECT 1, 'aa'

UNION ALL SELECT 1, 'bb'

UNION ALL SELECT 2, 'aaa'

UNION ALL SELECT 2, 'bbb'

UNION ALL SELECT 2, 'ccc'

 

-- 查询处理

SELECT *

FROM(

    SELECT DISTINCT 

        id

    FROM @t

)A

OUTER APPLY(

    SELECT 

        [values]= STUFF(REPLACE(REPLACE(

            (

                SELECT value FROM @t N

                WHERE id = A.id

                FOR XML AUTO

            ), '<N value="', ','), '"/>', ''), 1, 1, '')

)N

/*--结果

id          values

----------- ----------------

1           aa,bb

2           aaa,bbb,ccc

 

(2 行受影响)

--*/