在SQL Server 2012中读取XML数据

Question

I want to read xml data in the xml file. I have a table column consist with the xml data.

if i click on the xml file it will open in the Sql server Management studio.
xml file format shown below.

I want to read only NTDomainName, DatabaseName and ServerName and write that data in the another Table. Table format shown below

NTDomainName | DatabaseName | ServerName 
----------
ABC          | TestCube1    | SERXYZ

Answer 1

Try this:

declare @xml xml
set @xml = '<event><data name="NTUserName"><value>MyName</value></data><data name="NTDomainName"><value>DomainName</value></data><data name="ServerName"><value>ServerName</value></data></event>'

select [NTDomainName], [DatabaseName], [ServerName] from
(
    select [name],[value] from (
        select c.value('./@name', 'varchar(100)') [name], c.value('(./value)[1]', 'varchar(100)') [value]
        from @xml.nodes('/event/data') as t(c)
    ) a where [name] in ('NTDomainName', 'DatabaseName', 'ServerName')
) x
pivot (
    max(value) for [name] in ([NTDomainName], [DatabaseName], [ServerName])
) as [pivot_Name] 

The most inner query will retrieve information from XML, one row for every name attribute value, that you want to retrieve. So, output of this query needs to be pivoted.

Answer 2

i think you look for this:

SELECT * FROM (
SELECT 
CAST(f.x.query('data(@name)') as varchar(150)) as data_name,
CAST(f.x.query('data(value)') as varchar(150)) as data_value
FROM @xml.nodes('/event') as t(n)
CROSS APPLY t.n.nodes('data') as f(x)) X
PIVOT (MAX(data_value) FOR data_name IN (NTDomainName, DatabaseName, ServerName)) as pvt

Answer 3

If you do not want to use PIVOT :

DECLARE @DataSource TABLE
(
    [ID] TINYINT IDENTITY(1,1)
   ,[XML] XML
);

INSERT INTO @DataSource ([XML])
VALUES ('<event><data name="SessionID">S1</data><data name="NTUserName">User1</data><data name="DatabaseName">DB1</data><data name="ServerName">SN1</data></event>')
      ,('<event><data name="SessionID">S1</data><data name="NTUserName">User2</data><data name="DatabaseName">DB2</data><data name="ServerName">SN2</data></event>');

SELECT [ID]
      ,MAX(CASE wHEN C.value('(./@name)[1]', 'varchar(50)')  = 'NTUserName' THEN C.value('(.)[1]', 'varchar(50)')  END) AS [NTUserName]
      ,MAX(CASE wHEN C.value('(./@name)[1]', 'varchar(50)')  = 'DatabaseName' THEN C.value('(.)[1]', 'varchar(50)')  END) AS [DatabaseName]
      ,MAX(CASE wHEN C.value('(./@name)[1]', 'varchar(50)')  = 'ServerName' THEN C.value('(.)[1]', 'varchar(50)')  END) AS [ServerName]
FROM @DataSource
CROSS APPLY [XML].nodes('event/data[@name = "NTUserName" or @name = "DatabaseName" or @name = "ServerName"]') T(c)
GROUP BY [ID];