SQL XML 字段操作

---------------------------------------------------一
DECLARE @myDoc xml
SET @myDoc =
'<root>
<item ID="1">
</item>
</root>'
--SELECT @myDoc
-- 插入item的第1个子节点，此时不需要指定as first或as last
SET @myDoc.modify(N'
insert <author>张洪举</author>
into (/root/item)[1]')
SELECT @myDoc
-- 插入item的第2个子节点，as first指定插入到同级子节点的前面
SET @myDoc.modify(N'
insert <title>SQL Server 2005开发宝典</title>
as first into (/root/item)[1]')
SELECT @myDoc
-- 插入第2个item节点
SET @myDoc.modify('
insert <item ID="2"></item>
into (/root)[1]')
SELECT @myDoc
-- 向第2个item中插入第1个子节点
SET @myDoc.modify('
insert <title>SQL Server 2005的新增功能</title>
as first into (/root/item)[2]')
SELECT @myDoc
GO
---------------------------------------------------二
DECLARE @myDoc xml
SET @myDoc = '<root>
<item ID="1">
</item>
</root>'
SELECT @myDoc
SET @myDoc.modify('
insert (
<title>SQL Server 2005开发宝典</title>,
<author>张洪举</author>
)
into (/root/item)[1]');
SELECT @myDoc
GO
---------------------------------------------------三
DECLARE @myDoc xml
SET @myDoc = N'<root>
<item ID="1">
<title>Ajax实战</title>
<author>张洪举</author>
</item>
<item ID="2">
<title>Ajax实战</title>
<author>张洪举</author>
</item>
</root>'
SELECT @myDoc
SET @myDoc.modify(N'
insert attribute ShipTo {"广州"}
into (/root/item[@ID=1])[1]');

SET @myDoc.modify(N'
insert attribute ShipVia {"UPS"}
into (/root/item[@ID=1])[1]');

SELECT @myDoc
-- 通过一个sql变量指定要插入属性ShipDate的值
DECLARE @ShipDate char(11)
SET @ShipDate='2006-01-23Z'
SET @myDoc.modify('
insert attribute ShipDate {sql:variable("@ShipDate") cast as xs:date ?}
into (/root/item[@ID=1])[1]') ;
SELECT @myDoc
-- 插入多个属性，属性之间使用逗号分隔，并包含在括号内
SET @myDoc.modify('
insert (
attribute PostCode {"253020" },
attribute Weight {"1.5"}
)
into (/root/item[@ID=1])[1]');
SELECT @myDoc
GO
---------------------------------------------------四
DECLARE @myDoc xml
SET @myDoc = N'<root>
<item ID="1">
<title>Ajax实战</title>
<author>张洪举</author>
</item>
<item ID="2">
<title>ASP.NET实战</title>
<author>卢桂章</author>
</item>
</root>'
SET @myDoc.modify('
insert <!-- 注释 -->
after (/root/item[@ID=2]/title)[1]');
SELECT @myDoc
GO
---------------------------------------------------五
DECLARE @myDoc xml
SET @myDoc = N'<root>
<item ID="1">
<title>Ajax实战</title>
<author>张洪举</author>
</item>
<item ID="2">
<title>ASP.NET实战</title>
<author>卢桂章</author>
</item>
</root>'
SET @myDoc.modify(N'
insert <desc><![CDATA[ <送货方式>上门<价款>未收]]></desc>
into (/root/item[@ID=2])[1] ') ;
SELECT @myDoc
GO
---------------------------------------------------六
DECLARE @myDoc xml
SET @myDoc = N'<root>
<item ID="1">
<title>Ajax实战</title>
<author>张洪举</author>
</item>
</root>'
SET @myDoc.modify(N'
insert text{"订单列表"}
as first into (/root)[1]');
SELECT @myDoc
GO
---------------------------------------------------六
use jobproject
CREATE XML SCHEMA COLLECTION MySchemas
AS
N'<?xml version = "1.0"?>
<xsd:schema targetNamespace="http://schemas.mybook.com/customerschemas"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="customer">
<xsd:complexType>
<xsd:sequence>
<xsd:element maxOccurs="unbounded" name="item">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="customername" type="xsd:string"/>
<xsd:element name="address" type="xsd:string"/>
<xsd:element name="phone" type="xsd:string"/>
<xsd:element name="contact" type="xsd:string"/>
</xsd:sequence>
<xsd:attribute name="ID" type="xsd:int"/>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>';
GO
-- 创建包含xml数据类型列的表
CREATE TABLE MyCustomer
(CustomerID int IDENTITY PRIMARY KEY,
CustomerItem xml(MySchemas));
GO
-- 向表中插入XML，该XML应当符合http://schemas.mybook.com/customerschemas命名空间架构的定义
INSERT INTO MyCustomer
VALUES
(N'<C:customer xmlns:C="http://schemas.mybook.com/customerschemas">
<item ID="1">
<customername>北方书城</customername>
<address>北京市海淀区知春路22号</address>
<phone>2222222</phone>
<contact>刘先生</contact>
</item>
</C:customer>');
-- 使用XML DML insert插入另一个item节点到XML中
UPDATE MyCustomer
SET CustomerItem.modify('
declare namespace CS="http://schemas.mybook.com/customerschemas";
insert (<item ID="2">
<customername>东图大厦</customername>
<address>长春市朝阳大街99号</address>
<phone>1111111</phone>
<contact>孙小姐</contact>
</item>)
into (/CS:customer)[1] ')
WHERE CustomerID=1;
SELECT CustomerItem
FROM Mycustomer;
GO
---------------------------------------------------七
DECLARE @myDoc xml
SET @myDoc = '<?Instructions for=TheWC.exe ?>
<root>
<!-- 这里是注释 -->
<item ID="1" ShipTo="广州">这里是文本
<title>Ajax实战</title>
<author>张洪举</author>
</item>
<item ID="2">
<title>ASP.NET实战</title>
<author>卢桂章</author>
</item>
</root>'
SELECT @myDoc
-- 删除注释
SET @myDoc.modify('
delete /root/comment()
')
SELECT @myDoc
-- 删除所有指令
SET @myDoc.modify('
delete //processing-instruction()
')
SELECT @myDoc
-- 删除ID为1的item中的文本节点
SET @myDoc.modify('
delete /root/item[@ID=1]/text()
')
SELECT @myDoc
-- 删除一个属性
SET @myDoc.modify('
delete /root/item[@ID=1]/@ShipTo
')
SELECT @myDoc
-- 删除一个元素
SET @myDoc.modify('
delete /root/item[@ID=2]/author
')
SELECT @myDoc

-- 删除ID为2的item节点
SET @myDoc.modify('
delete /root/item[@ID=2]
')
SELECT @myDoc
GO
---------------------------------------------------八
UPDATE MyCustomer
SET CustomerItem.modify('
declare namespace CS="http://schemas.mybook.com/customerschemas";
delete /CS:customer/item[@ID=2]
');
SELECT CustomerItem FROM MyCustomer;
GO
---------------------------------------------------九
DECLARE @myDoc xml
SET @myDoc = '<root>
<item ID="1">
<title>Ajax实战</title>
<author>张洪举</author>
</item>
<item ID="2">
<title>ASP.NET实战</title>
<author>卢桂章</author>
</item>
</root>'
SELECT @myDoc
-- 更新ID为1的item中的title元素的文本
SET @myDoc.modify('
replace value of (/root/item[@ID=1]/title/text())[1]
with "Ajax实战攻略"
')
SELECT @myDoc
-- 更新属性值
SET @myDoc.modify('
replace value of (/root/item[@ID=2]/@ID)[1]
with "3"
')
SELECT @myDoc
---------------------------------------------------九
declare @xdoc xml
set @xdoc = N'<conn>
<mysql servername="192.168.1.120,3306">
<user name="root" password="" />
<user name="dba" password="" />
<user name="user" password="" />
</mysql>
<mssql servername="192.168.1.110,1433">
<user name="sa" password="" />
<user name="dba" password="" />
<user name="user" password="" />
</mssql>
<excel id="1" path="c:/database/" filename="source1.xls" />
<excel id="2" path="d:/database/" filename="source2.xls" />
<excel id="3" path="e:/database/" filename="source3.xls" />
</conn>
'
-------第一方法
select excel_path = t.c.value('@path' ,'varchar(255)')
,excel_name = t.c.value('@filename' ,'varchar(255)')
from @xdoc.nodes('/conn/excel') t (c)
where t.c.value('@id', 'int') = 1
-------第二方法
select excel_path = @xdoc.value('(/conn/excel[@id="1"]/@path)[1]', 'varchar(255)')
,excel_name = @xdoc.value('(/conn/excel[@id="1"]/@filename)[1]', 'varchar(255)')
-------第三方法
declare @excel_id int
set @excel_id = 1
select excel_path = @xdoc.value('(/conn/excel[@id=sql:variable("@excel_id")]/@path)[1]', 'varchar(255)')
,excel_name = @xdoc.value('(/conn/excel[@id=sql:variable("@excel_id")]/@filename)[1]', 'varchar(255)')

原文地址：http://hi.baidu.com/kjkj911/blog/item/d6d0f81f86a0e302304e15c4.html