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[转载]SQL 将一个字段内用逗号分隔的内容分成多条记录 – 岩子 – 博客园.
由于业务需求，我们可能会把一串以分割符字符串数据放到一个字段，如我们在客户端处理拆分是很简单的，不过这样做效果不太好，怎么用SQL SERVER 2008 来解决这件事件哪？
方案1
用SQL SERVER XML 功能来解决
----> 生成测试数据: @T
DECLARE @T TABLE (id INT,Col1 VARCHAR(50),Col2 VARCHAR(50))
INSERT INTO @T
SELECT 1,'卸货费','运输车队业务, 客服接单业务'
UNION ALL
SELECT 2,'报关费','报关业务、客服接单业务'
----SQL查询如下:
SELECT
T.id,
A.x.value('.','varchar(10)') AS code,
B.x.value('.','varchar(10)') AS code2
FROM (
SELECT *,doc = CONVERT(xml,''+REPLACE(code,',','')+''),
doc2=CONVERT(xml,''+REPLACE(code2,',','')+'')
FROM @T
) AS T
CROSS APPLY doc.nodes('//v') AS A(x)
CROSS APPLY doc2.nodes('//v') AS B(x)
方案2
用SQL SERVER WITH 递归查询
WITH roy
AS ( SELECT Col1 ,
COl2 = CAST(LEFT(Col2, CHARINDEX(',', Col2 + ',') - 1) AS NVARCHAR(100)) ,
Split = CAST(STUFF(COl2 + ',', 1,
CHARINDEX(',', Col2 + ','), '') AS NVARCHAR(100))
FROM Tab
UNION ALL
SELECT Col1 ,
COl2 = CAST(LEFT(Split, CHARINDEX(',', Split) - 1) AS NVARCHAR(100)) ,
Split = CAST(STUFF(Split, 1, CHARINDEX(',', Split), '') AS NVARCHAR(100))
FROM Roy
WHERE split > ''
)
SELECT COl1 ,
COl2
FROM roy
ORDER BY COl1
OPTION ( MAXRECURSION 0 )
