在SQL查詢中從xml中提取數據

我試圖查詢SQL 2008R2數據庫Surveillance，並從表中提取MacAddress值Hardware我是SQL查詢的新手，但很快就會學習。任何建議將不勝感激。在SQL查詢中從xml中提取數據

<properties> 
    <settings hwid="hardware"> 
    <setting typeid="DAF813F8-2E02-4AE5-9F0F-B0FB203D3CB6"> 
     <name>ProductID</name> 
     <value>AxisP3301</value> 
    </setting> 
    <setting typeid="F9D27CE8-8FA9-4B91-8C85-3E80DE7EF0AB"> 
     <name>MacAddress</name> 
     <value>00408CC3ABCF</value> 
    </setting> 
    <setting typeid="FC714851-E998-4738-A140-F4FF20E99DEB"> 
     <name>FirmwareVersion</name> 
     <value>5.40.9.2</value> 
    </setting> 
    <setting typeid="F1DED00E-9614-475F-A6F7-BA29FCA8DE39"> 
     <name>SerialNumber</name> 
     <value>00408CC3ABCF</value> 
    </setting> 
    <setting typeid="5BE128A3-BDEC-4FEE-8690-D575DF03E3EE"> 
     <name>Bandwidth</name> 
     <value>Unlimited</value> 
    </setting> 
    <setting typeid="188A93DE-67D8-417E-BCFC-FF5B3F74434A"> 
     <name>AudioEncoding</name> 
     <value>G711</value> 
    </setting> 
    <setting typeid="5ADCDA37-78B3-4AB9-93E5-966EDE722FA3"> 
     <name>AlertEventServerIP</name> 
     <value /> 
    </setting> 
    <setting typeid="922AAF32-821A-4E24-A646-72A4AE592364"> 
     <name>AlertEventServerPort</name> 
     <value>0</value> 
    </setting> 
    <setting typeid="18BF9B14-D675-40A1-B57D-90A03272468A"> 
     <name>SmtpEventServerIP</name> 
     <value /> 
    </setting> 
    <setting typeid="5F614912-4C46-453E-9043-3BFC15321E56"> 
     <name>SmtpEventServerPort</name> 
     <value>25</value> 
    </setting> 
    <setting typeid="9F739984-A2C0-4E09-AAB6-97F229E9F208"> 
     <name>InternalEventServerIP</name> 
     <value>25</value> 
    </setting> 
    <setting typeid="59094737-81C6-4FC2-B748-0005C390A775"> 
     <name>AttachmentSavePath</name> 
     <value /> 
    </setting> 
    <setting typeid="AF8875BC-7B45-4EBC-92DC-4E3959810A2E"> 
     <name>InternalEventServerPort</name> 
     <value /> 
    </setting> 
    <setting typeid="2B22F067-7AA4-4486-A206-85CBE3BE3285"> 
     <name>HTTPSPort</name> 
     <value>443</value> 
    </setting> 
    <setting typeid="DA6E7891-54FA-4902-8164-75A790C11F17"> 
     <name>HTTPSEnabled</name> 
     <value>no</value> 
    </setting> 
    </settings> 
</properties>

來源

2015-06-09 Kevin Toler

鏈接你只盯着一行數據還是有與XML數據類型你試圖解析多行？ – jradich1234

你已經嘗試了什麼？ –

您可以使用功能value()和正確的XQuery來得到你所需要的結果：

SELECT Settings.value('(/properties/settings/setting[name="MacAddress"]/value/text())[1]', 'varchar(255)') as MacAddress 
FROM Hardware

在這裏，你會發現有子元素name與價值MacAddress的setting元素，並採取其子文元素value。當使用value()函數時，您需要提供數據類型，因此在這種情況下提供的數據類型爲varchar(255)。

這裏是SQL Fiddle

來源

2015-06-09 16:54:36 dotnetom

在SQL查詢中從xml中提取數據

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