Question

'嗨，我正在尝试将自动XML加载创建到SQL中，最初我需要使用正确的数据集创建表。最终，我试图获得序列号，IP地址和时区以及“从到”到“时间戳”的所有计数值。这是我的XML的样子：

<response xmlns="http://www.test.com/sensor-api/v2">
  <sensor-time timezone="America/New_York">2017-07-18T15:45:03-04:00</sensor-time>
  <status>
    <code>OK</code>
  </status>
  <sensor-info>
    <serial-number>Q8:80:39:60:9Z:F2</serial-number>
    <ip-address>192.167.130.18</ip-address>
    <name>Test</name>
    <group />
    <device-type>PC2 - UL</device-type>
  </sensor-info>
  <content>
    <elements>
      <element>
        <element-id>2</element-id>
        <element-name>Conf_Lower_Zone</element-name>
        <sensor-type>SINGLE_SENSOR</sensor-type>
        <data-type>ZONE</data-type>
        <from>2017-07-18T15:40:00-04:00</from>
        <to>2017-07-18T15:45:00-04:00</to>
        <resolution>ONE_MINUTE</resolution>
          <measurements>
            <measurement>
              <from>2017-07-18T15:40:00-04:00</from>
              <to>2017-07-18T15:41:00-04:00</to>
              <values>
                <value label="count">0</value>
              </values>
            </measurement>
          <measurement>
              <from>2017-07-18T15:41:00-04:00</from>
              <to>2017-07-18T15:42:00-04:00</to>
               <values>
                  <value label="count">0</value>
               </values>
          </measurement>

这是我的SQL部分：

CREATE DATABASE OPENXMLTesting
GO

USE OPENXMLTesting
GO

CREATE TABLE XMLwithOpenXML
(
Id INT IDENTITY PRIMARY KEY,
XMLData XML,
LoadedDateTime DATETIME
)

INSERT INTO XMLwithOpenXML(XMLData, LoadedDateTime)
SELECT CONVERT(XML, BulkColumn) AS BulkColumn, GETDATE() 
FROM OPENROWSET(BULK 'C:\Example\Test.xml', SINGLE_BLOB) AS x;

SELECT * FROM XMLwithOpenXML

USE OPENXMLTesting
GO

DECLARE @XML AS XML, @hDoc AS INT, @SQL NVARCHAR (MAX)

SELECT @XML = XMLData FROM XMLwithOpenXML

EXEC sp_xml_preparedocument @hDoc OUTPUT, @XML

SELECT [element-id], [element-name], [data-type], [ip-address]

FROM OPENXML(@hDoc, 
'content/elements/element/measurements/measurement/values/value')

WITH 
(   
    [element-id] varchar (100) '@ElementID',
    [element-name] varchar(50) '@Element_Name',
    [data-type] varchar(50) '@Data_Type',
    [ip-address] varchar(50) '@IP_Address'
)

EXEC sp_xml_removedocument @hDoc
GO

问题在于，结果是我仅获得标头，而其下没有任何数据。请参见下面的图片。

我在做什么错？

Answer 1

有两个问题...

首先涉及一个名称空间。由于它是默认名称空间，因此必须对其进行声明或通配。

第二，用FROM OPENXML选择的方法以及用于创建和删除文档的两个存储过程已经完全过时了。您应该使用现代的本机XML方法。试试这个：

DECLARE @xml XML=
N'<response xmlns="http://www.test.com/sensor-api/v2">
  <sensor-time timezone="America/New_York">2017-07-18T15:45:03-04:00</sensor-time>
  <status>
    <code>OK</code>
  </status>
  <sensor-info>
    <serial-number>Q8:80:39:60:9Z:F2</serial-number>
    <ip-address>192.167.130.18</ip-address>
    <name>Test</name>
    <group />
    <device-type>PC2 - UL</device-type>
  </sensor-info>
  <content>
    <elements>
      <element>
        <element-id>2</element-id>
        <element-name>Conf_Lower_Zone</element-name>
        <sensor-type>SINGLE_SENSOR</sensor-type>
        <data-type>ZONE</data-type>
        <from>2017-07-18T15:40:00-04:00</from>
        <to>2017-07-18T15:45:00-04:00</to>
        <resolution>ONE_MINUTE</resolution>
        <measurements>
          <measurement>
            <from>2017-07-18T15:40:00-04:00</from>
            <to>2017-07-18T15:41:00-04:00</to>
            <values>
              <value label="count">0</value>
            </values>
          </measurement>
          <measurement>
            <from>2017-07-18T15:41:00-04:00</from>
            <to>2017-07-18T15:42:00-04:00</to>
            <values>
              <value label="count">0</value>
            </values>
          </measurement>
        </measurements>
      </element>
    </elements>
  </content>
</response>';

-查询需要声明名称空间
-我将使用直接调用来获取奇异值
--...和.nodes()以获得1:n相关元素的派生集

WITH XMLNAMESPACES(DEFAULT 'http://www.test.com/sensor-api/v2')
SELECT @xml.value('(/response/sensor-time/@timezone)[1]','nvarchar(max)') AS SensortTime_TimeZone
      ,@xml.value('(/response/sensor-time/text())[1]','datetime') AS SensortTime
      ,@xml.value('(/response/status/code/text())[1]','nvarchar(max)') AS StatusCode
      ,@xml.value('(/response/sensor-info/serial-number/text())[1]','nvarchar(max)') AS SerialNumber
      ,e.value('(element-id/text())[1]','int') AS ElementId
      ,e.value('(element-name/text())[1]','nvarchar(max)') AS ElementName
      --more from here
      ,m.value('(from/text())[1]','datetime') AS Measurement_From
      ,m.value('(to/text())[1]','datetime') AS Measurement_To
      ,m.value('(values/value/@label)[1]','nvarchar(max)') AS Measurement_Label
      ,m.value('(values/value/text())[1]','int') AS Measurement_Label
FROM @xml.nodes('/response/content/elements/element') A(e)
OUTER APPLY e.nodes('measurements/measurement') B(m);

SQL Server-XML加载问题

1 个答案: