SQL 将一个字段内用逗号分隔的内容分成多条记录
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
View Code
1 ----> 生成测试数据: @T
2 DECLARE @T TABLE (id INT,Col1 VARCHAR(50),Col2 VARCHAR(50))
3 INSERT INTO @T
4 SELECT 1,'卸货费','运输车队业务, 客服接单业务'
5 UNION ALL
6 SELECT 2,'报关费','报关业务、客服接单业务'
View Code
----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,'<v>'+REPLACE(code,',','</v><v>')+'</v>'),
doc2=CONVERT(xml,'<v>'+REPLACE(code2,',','</v><v>')+'</v>')
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
1 WITH roy
2 AS ( SELECT Col1 ,
3 COl2 = CAST(LEFT(Col2, CHARINDEX(',', Col2 + ',') - 1) AS NVARCHAR(100)) ,
4 Split = CAST(STUFF(COl2 + ',', 1,
5 CHARINDEX(',', Col2 + ','), '') AS NVARCHAR(100))
6 FROM Tab
7 UNION ALL
8 SELECT Col1 ,
9 COl2 = CAST(LEFT(Split, CHARINDEX(',', Split) - 1) AS NVARCHAR(100)) ,
10 Split = CAST(STUFF(Split, 1, CHARINDEX(',', Split), '') AS NVARCHAR(100))
11 FROM Roy
12 WHERE split > ''
13 )
14 SELECT COl1 ,
15 COl2
16 FROM roy
17 ORDER BY COl1
18 OPTION ( MAXRECURSION 0 )
