如何从SQL的XML列中选择值？

分类：编程问答

如何解决如何从SQL的XML列中选择值？

我将以下XML存储在名为Sub_FORM的SQL Server表的XML列（称为XML_FORM）中，我需要为“ txtOriginalIdFacility”字段提取值（00006789）。

 <DynamicFormValue><GOVf1154><dataField><id>ucGOVf1154_MainForm</id><value /><tag /> 
 <visible>true</visible><history>|3/7/2019 4:40:49 PM|LGeorge||</history><description /><comment /> 
 </dataField><dataField><id>rdoOption_NOI</id><value>false</value><tag /><visible>true</visible> 
 <history>false|3/7/2019 4:40:49 PM|LGeorge||</history><description /><comment /></dataField> 
 <dataField><id>rdoOption_NEE</id><value>true</value><tag /><visible>true</visible> 
 <history>true|3/7/2019 4:40:49 PM|LGeorge||</history><description /><comment /></dataField> 
 <dataField><id>rdoOption_NOT</id><value>false</value><tag /><visible>true</visible> 
 <history>false|3/7/2019 4:40:49 PM|LGeorge||</history><description /><comment /></dataField> 
<dataField><id>txtForm</id><value>NEE Form</value><tag /><visible>false</visible><history> 
 Form|3/7/2019 4:40:49 PM|LGeorge||</history><description /><comment /></dataField><dataField> 
<id>txtForm_F1</id><value>NOI Form</value><tag /><visible>false</visible><history>Form|3/7/2019 
4:40:49 PM|LGeorge||</history><description /><comment /></dataField><dataField><id>txtForm_F2</id> 
<value>NEE Form</value><tag /><visible>false</visible><history>Form|3/7/2019 4:40:49 PM|LGeorge|| 
</history><description /><comment /></dataField><dataField><id>txtForm_F3</id><value>NOT Form</value> 
<tag /><visible>false</visible><history> Form|3/7/2019 4:40:49 PM|LGeorge||</history><description /> 
<comment /></dataField></GOVf1154><GOVf1154_NEE><dataField><id>rdoType</id><value>Initial 
Notification</value><tag /><visible>true</visible><history>Initial Notification|3/7/2019 4:41:15 
PM|Lge||</history><description /><comment /></dataField><dataField><id>txtFormerOwnerName</id><value 
/><tag /><visible>true</visible><history>|3/7/2019 4:41:15 PM|LG||</history><description /><comment 
/></dataField><dataField><id>ucontrolFacility</id><value /><tag /><visible>true</visible> 
<history>|3/13/2019 11:12:01 AM|LP||</history><description /><comment /></dataField><dataField> 
<id>chkInternationalMailingAddress</id><value>false</value><tag /><visible>true</visible> 
<history>false|3/7/2019 4:41:15 PM|LG||</history><description /><comment /></dataField><dataField> 
<id>txtInternationalMailingAddress</id><value /><tag>International Mailing Address</tag> 
<visible>false</visible><history>|3/7/2019 4:41:15 PM|LGeorge||</history><description /><comment /> 
</dataField><dataField><id>ddlFacility</id><value>20000</value><tag /><visible>false</visible> 
<history>251750|3/7/2019 4:41:15 PM|LGeorge||</history><description /><comment /></dataField> 
<dataField><id>txtFacilityName</id><value>FB</value><tag>Facility</tag><visible>false</visible> 
<history>|3/7/2019 4:41:15 PM|LGeorge||#! (FH)|3/13/2019 11:12:01 AM|LPurvis||</history> 
<description/><comment /></dataField><dataField><id>txtOriginalIdFacility</id><value>00006789</value>

解决方法

我认为您正在尝试说“获取id元素的值，其中父dataField节点的id元素的值为'txtOriginalIdFacility'”。使用value函数返回标量值，并提供完整的XPath查询以查找元素，如下所示：

-- Get the value element where the parent dataField node has an id element with the value "txtOriginalIdFacility"
SELECT XML_FORM.value('(DynamicFormValue/GOVf1154_NEE/dataField[id = "txtOriginalIdFacility"]/value)[1]','VARCHAR(50)')
FROM Sub_FORM

使用表变量作为示例的完整测试脚本：

DECLARE @Sub_FORM TABLE ( XML_FORM XML )

INSERT INTO @Sub_FORM
SELECT '<DynamicFormValue>
    <GOVf1154>
        <dataField>
            <id>ucGOVf1154_MainForm</id>
            <value />
            <tag />
            <visible>true</visible>
            <history>|3/7/2019 4:40:49 PM|LGeorge||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>rdoOption_NOI</id>
            <value>false</value>
            <tag />
            <visible>true</visible>
            <history>false|3/7/2019 4:40:49 PM|LGeorge||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>rdoOption_NEE</id>
            <value>true</value>
            <tag />
            <visible>true</visible>
            <history>true|3/7/2019 4:40:49 PM|LGeorge||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>rdoOption_NOT</id>
            <value>false</value>
            <tag />
            <visible>true</visible>
            <history>false|3/7/2019 4:40:49 PM|LGeorge||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>txtForm</id>
            <value>NEE Form</value>
            <tag />
            <visible>false</visible>
            <history>Form|3/7/2019 4:40:49 PM|LGeorge||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>txtForm_F1</id>
            <value>NOI Form</value>
            <tag />
            <visible>false</visible>
            <history>Form|3/7/2019 4:40:49 PM|LGeorge||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>txtForm_F2</id>
            <value>NEE Form</value>
            <tag />
            <visible>false</visible>
            <history>Form|3/7/2019 4:40:49 PM|LGeorge|| 
            </history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>txtForm_F3</id>
            <value>NOT Form</value>
            <tag />
            <visible>false</visible>
            <history> Form|3/7/2019 4:40:49 PM|LGeorge||</history>
            <description />
            <comment />
        </dataField>
    </GOVf1154>
    <GOVf1154_NEE>
        <dataField>
            <id>rdoType</id>
            <value>Initial Notification</value>
            <tag />
            <visible>true</visible>
            <history>Initial Notification|3/7/2019 4:41:15 PM|Lge||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>txtFormerOwnerName</id>
            <value/>
            <tag />
            <visible>true</visible>
            <history>|3/7/2019 4:41:15 PM|LG||</history>
            <description />
            <comment/>
        </dataField>
        <dataField>
            <id>ucontrolFacility</id>
            <value />
            <tag />
            <visible>true</visible>
            <history>|3/13/2019 11:12:01 AM|LP||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>chkInternationalMailingAddress</id>
            <value>false</value>
            <tag />
            <visible>true</visible>
            <history>false|3/7/2019 4:41:15 PM|LG||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>txtInternationalMailingAddress</id>
            <value />
            <tag>International Mailing Address</tag>
            <visible>false</visible>
            <history>|3/7/2019 4:41:15 PM|LGeorge||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>ddlFacility</id>
            <value>20000</value>
            <tag />
            <visible>false</visible>
            <history>251750|3/7/2019 4:41:15 PM|LGeorge||</history>
            <description />
            <comment />
        </dataField>
        <dataField>
            <id>txtFacilityName</id>
            <value>FB</value>
            <tag>Facility</tag>
            <visible>false</visible>
            <history>|3/7/2019 4:41:15 PM|LGeorge||#! (FH)|3/13/2019 11:12:01 AM|LPurvis||</history>
            <description/>
            <comment />
        </dataField>
        <dataField>
            <id>txtOriginalIdFacility</id>
            <value>00006789</value>
        </dataField>
    </GOVf1154_NEE>
</DynamicFormValue>'

-- Get the value for the id element where the parent dataField node has a id element with the value "txtOriginalIdFacility"
SELECT XML_FORM.value('(DynamicFormValue/GOVf1154_NEE/dataField[id = "txtOriginalIdFacility"]/value)[1]','VARCHAR(50)')
FROM @Sub_FORM

我的结果：

My results

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。

相关推荐

导入项目后报错问题
依赖报错 idea导入项目后依赖报错，解决方案：https://blog.csdn.net/weixin_42420249/article/details/81191861 依赖版本报错：更换其他版本 无法下载依赖可参考：https://blog.csdn.net/weixin_42628809/a
idea不能识别yaml文件
使用mybatis plus常见错误
错误1：代码生成器依赖和mybatis依赖冲突 启动项目时报错如下 2021-12-03 13:33:33.927 ERROR 7228 [ main] o.s.b.d.LoggingFailureAnalysisReporter : *************************** APPL
gradle常见问题与错误
错误1：gradle项目控制台输出为乱码 # 解决方案：https://blog.csdn.net/weixin_43501566/article/details/112482302 # 在gradle-wrapper.properties 添加以下内容 org.gradle.jvmargs=-Df
Mybatis Plus传入参数0不起作用
错误还原：在查询的过程中，传入的workType为0时，该条件不起作用 &lt;select id=&quot;xxx&quot;&gt; SELECT di.id, di.name, di.work_type, di.updated... &lt;where&gt; &lt;if test=&qu
linux中make编译源码包失败
报错如下，gcc版本太低 ^ server.c:5346:31: 错误：‘struct redisServer’没有名为‘server_cpulist’的成员 redisSetCpuAffinity(server.server_cpulist); ^ server.c: 在函数‘hasActiveC
微服务启动错误：Command line is too long. Shorten command line for
解决方案1 1、改项目中.idea/workspace.xml配置文件，增加dynamic.classpath参数 2、搜索PropertiesComponent，添加如下 &lt;property name=&quot;dynamic.classpath&quot; value=&quot;tru
vue常见错误
删除根组件app.vue中的默认代码后报错：Module Error (from ./node_modules/eslint-loader/index.js): 解决方案：关闭ESlint代码检测，在项目根目录创建vue.config.js，在文件中添加 module.exports = { lin
spark常见错误
查看spark默认的python版本 [root@master day27]# pyspark /home/software/spark-2.3.4-bin-hadoop2.7/conf/spark-env.sh: line 2: /usr/local/hadoop/bin/hadoop: No s
matplotlib报错：AttributeError: module 'backend_interagg' has no attribute 'FigureCanvas'. Did you mean: 'FigureCanvasAgg'?
使用本地python环境可以成功执行 import pandas as pd import matplotlib.pyplot as plt # 设置字体 plt.rcParams[&#39;font.sans-serif&#39;] = [&#39;SimHei&#39;] # 能正确显示负号 p
gitlab登录失败，报错：This challenge page was accidentally cached by an intermediary and is no longer available.
设置时间 控制面板
后端开发常见错误
错误1：Request method ‘DELETE‘ not supported 错误还原：controller层有一个接口，访问该接口时报错：Request method ‘DELETE‘ not supported 错误原因：没有接收到前端传入的参数，修改为如下 参考 错误2：cannot r
docker常见错误
错误1：启动docker镜像时报错：Error response from daemon: driver failed programming external connectivity on endpoint quirky_allen 解决方法：重启docker -&gt; systemctl r
idea常见错误
错误1：private field ‘xxx‘ is never assigned 按Altʾnter快捷键，选择第2项 参考：https://blog.csdn.net/shi_hong_fei_hei/article/details/88814070 错误2：启动时报错，不能找到主启动类 #
pip安装依赖失败
报错如下，通过源不能下载，最后警告pip需升级版本 Requirement already satisfied: pip in c:\users\ychen\appdata\local\programs\python\python310\lib\site-packages (22.0.4) Coll
maven常见错误
错误1：maven打包报错 错误还原：使用maven打包项目时报错如下 [ERROR] Failed to execute goal org.apache.maven.plugins:maven-resources-plugin:3.2.0:resources (default-resources)
cloud项目中常见错误
错误1：服务调用时报错 服务消费者模块assess通过openFeign调用服务提供者模块hires 如下为服务提供者模块hires的控制层接口 @RestController @RequestMapping(&quot;/hires&quot;) public class FeignControl
springboot常见错误
错误1：运行项目后报如下错误 解决方案 报错2：Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project sb 解决方案：在pom.
springmvc拦截器中使用redisTemplate报空指针异常
参考 错误原因 过滤器或拦截器在生效时，redisTemplate还没有注入 解决方案：在注入容器时就生效 @Component //项目运行时就注入Spring容器 public class RedisBean { @Resource private RedisTemplate&lt;String
vite报错：npm ERR! command C:WINDOWSsystem32cmd.exe /d /s /c C:UsersychenAppDataLocalTempnpx-dde1c848.cmd
使用vite构建项目报错 C:\Users\ychen\work&gt;npm init @vitejs/app @vitejs/create-app is deprecated, use npm init vite instead C:\Users\ychen\AppData\Local\npm-
pythonJavaScriptjavaHTMLPHPreactjsC#AndroidCSSNode.jssqlrpython-3.xMysqLjQueryc++pandasFlutterangularIOSdjangolinuxswifttypescript路由器JSON路由器设置无线路由器h3c华三华三路由器设置华三路由器电脑软件教程arraysdocker软件图文教程Cvue.jslaravelspring-boot