使用SQL Server 2008表中的新值更新Xml属性

Question

我在SQL Server 2008中有一个表,它有一些列.其中一列是Xml格式,我想更新一些属性.

例如,我的Xml列的名称是,XmlText并且它在5个第一行中的值如下:

 <Identification Name="John"  Family="Brown"     Age="30" /> 
 <Identification Name="Smith" Family="Johnson"   Age="35" /> 
 <Identification Name="Jessy" Family="Albert"    Age="60" />
 <Identification Name="Mike"  Family="Brown"     Age="23" />
 <Identification Name="Sarah" Family="Johnson"   Age="30" />

我想要更改Age30到40之间的所有属性,如下所示:

 <Identification Name="John"  Family="Brown"     Age="40" /> 
 <Identification Name="Smith" Family="Johnson"   Age="35" /> 
 <Identification Name="Jessy" Family="Albert"    Age="60" />
 <Identification Name="Mike"  Family="Brown"     Age="23" />
 <Identification Name="Sarah" Family="Johnson"   Age="40" />

Answer 1

从问题的早期版本看,您的XML实际上位于表中的不同行上.如果是这种情况,您可以使用它.

update YourTable set
  XMLText.modify('replace value of (/Identification/@Age)[1] with "40"')
where XMLText.value('(/Identification/@Age)[1]', 'int') = 30

使用表变量工作样本.

declare @T table(XMLText xml)

insert into @T values('<Identification Name="John"  Family="Brown"   Age="30" />')
insert into @T values('<Identification Name="Smith" Family="Johnson" Age="35" />') 
insert into @T values('<Identification Name="Jessy" Family="Albert"  Age="60" />')
insert into @T values('<Identification Name="Mike"  Family="Brown"   Age="23" />')
insert into @T values('<Identification Name="Sarah" Family="Johnson" Age="30" />')

update @T set
  XMLText.modify('replace value of (/Identification/@Age)[1] with "40"')
where XMLText.value('(/Identification/@Age)[1]', 'int') = 30

select *
from @T 

Answer 2

试试这个:

declare @xml XML

SET @xml = '<Root>
         <Identification Name="John"  Family="Brown"     Age="30" /> 
         <Identification Name="Smith" Family="Johnson"   Age="35" /> 
         <Identification Name="Jessy" Family="Albert"    Age="60" />
         <Identification Name="Mike"  Family="Brown"     Age="23" />
         <Identification Name="Sarah" Family="Johnson"   Age="30" />
         </Root>'

 DECLARE @nodeCount int
DECLARE @i int

SET @i = 1

SELECT @nodeCount = @xml.value('count(/Root/Identification/@Age)','int') 

PRINT 'Number of nodes found: ' + STR(@nodeCount)

WHILE (@i <= @nodeCount)
BEGIN
Set @xml.modify('replace value of (/Root/Identification/@Age)[.=30][1] with "40"')

SET @i = @i + 1
END

SELECT @xml