能否将 SQL Server 2012 数据导出到 XML 文件中

问题描述

下面是一个非常小的 SQL 和 XML 示例，但不知道如何将其导出到 C:\Users\Simon.Evans\Documents\Test.xml.公平地说，我对 XML 的了解很少甚至为零，所以在黑暗中行走.最终，我试图找到一种将 SQL 表导出到 XML 文件的方法.

Below is a very small example of the SQL and XML but no idea how to export this into say C:\Users\Simon.Evans\Documents\Test.xml. To be fair I have very little to zero knowledge of XML so walking in the dark. Ultimately I am trying to find a way to export for SQL tables into an XML file.

SELECT
    patient.OID AS '@ID',
    patient.FORENAME, patient.SURNAME,
    patient.TITLECODE,
    patient.BIRTHDTTM
FROM
    HealthBI.dbo.LZO_PATIENT patient
WHERE patient.OID = '3400000000'
FOR XML PATH('Patient'), ROOT('Patient')

而sql的XML输出是:

and the XML output of the sql is:

<Patient>
  <Patient ID="3400000000">
    <FORENAME>IDA</FORENAME>
    <SURNAME>CARR</SURNAME>
    <TITLECODE>CC_MRS</TITLECODE>
    <BIRTHDTTM>1929-10-25T00:00:00</BIRTHDTTM>
  </Patient>
</Patient>

推荐答案

将 XML 查询到文件中需要了解一点字符编码...

Querying XML into a file needs to know a little bit about character encoding...

试试这个:

USE master;
GO
CREATE DATABASE TestDB;
GO

CREATE TABLE TestDB.dbo.TestTbl(TestString1 VARCHAR(100),TestString2 NVARCHAR(100));
INSERT INTO TestDB.dbo.TestTbl VALUES('abc',  N'abc')
                                    ,('<&> Russian: "слов в тексте"', N'<&> Russian: "слов в тексте"');
GO
SELECT * FROM TestDB.dbo.TestTbl FOR XML PATH('Test'),ROOT('String');

/* The result of the simple SELECT shows, that VARCHAR cannot deal with russian letters
<String>
  <Test>
    <TestString1>abc</TestString1>
    <TestString2>abc</TestString2>
  </Test>
  <Test>
    <TestString1>&lt;&amp;&gt; Russian: "???? ? ??????"</TestString1>
    <TestString2>&lt;&amp;&gt; Russian: "слов в тексте"</TestString2>
  </Test>
</String>
*/
GO

--Two times the same command, only difference is -w instead of -c:
--And: YOU HAVE TO FULLY QUALIFY THE OBJECT's NAME!
DECLARE @cmd1 VARCHAR(4000)='bcp "SELECT * FROM TestDB.dbo.TestTbl FOR XML PATH(''object''),ROOT(''objects'');" queryout "c:\dvp\test1.xml" -T -c -S' + @@SERVERNAME;
DECLARE @cmd2 VARCHAR(4000)='bcp "SELECT * FROM TestDB.dbo.TestTbl FOR XML PATH(''object''),ROOT(''objects'');" queryout "c:\dvp\test2.xml" -T -w -S' + @@SERVERNAME;

EXECUTE master..xp_cmdshell @cmd1;
EXECUTE master..xp_cmdshell @cmd2;
GO
DROP DATABASE TestDb;
GO

使用 -c 的第一个命令的结果现在即使使用 NVARCHAR

The result of the first command with -c will now destroy the russian letters even with NVARCHAR

<objects>
  <object>
    <TestString1>abc</TestString1>
    <TestString2>abc</TestString2>
  </object>
  <object>
    <TestString1>&lt;&amp;&gt; Russian: "???? ? ??????"</TestString1>
    <TestString2>&lt;&amp;&gt; Russian: "???? ? ??????"</TestString2>
  </object>
</objects>

带有 -w 的第二个命令的结果符合预期:

The result of the second command with -w is as expected:

<objects>
  <object>
    <TestString1>abc</TestString1>
    <TestString2>abc</TestString2>
  </object>
  <object>
    <TestString1>&lt;&amp;&gt; Russian: "???? ? ??????"</TestString1>
    <TestString2>&lt;&amp;&gt; Russian: "слов в тексте"</TestString2>
  </object>
</objects>

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