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我有一个源表，其中每一行都有一个 XML 字段，其中包含未知数量的调查响应，我需要将其分解并放入输出表中。我已经尝试过节点和 OPENXML，但我似乎无法让它工作。根据我的研究，我认为我需要使用 CROSS APPLY，但我似乎无法以我理解的方式将它全部放在我的脑海中并让它发挥作用。如果我遗漏了一些简单的东西，我深表歉意，但我真的被困住了，希望为如何处理这个问题提供任何帮助。

这是包含导入数据（我无法控制的格式）的源表，如下所示：

ImportId    SurveyId    DateImported              ResponseData
--------    --------    ------------              ------------
1           11223344    2017-05-21 18:00:00.00    <survey><data><result>...
2           55667788    2017-05-21 18:01:00.00    <survey><data><result>...
3           99009988    2017-05-21 18:02:00.00    <survey><data><result>...

下面是 ResponseData 列中 XML 的简化示例：

<survey>
    <data>
        <result>
            <id>12345</id>
            <date_submitted>2017-05-10 09:30:15</date_submitted>
            <url_variables>
                <respondent_id>
                    <key>respondent_id</key>
                    <value>987654</value>
                    <type>url</type>
                </respondent_id>
                <respondent_level>
                    <key>respondent_level</key>
                    <value>5</value>
                    <type>url</type>
                </respondent_level>
            </url_variables>
            <survey_data>
                <question>
                    <id>1</id>
                    <answer>Yes</answer>
                </question>
                <question>
                    <id>2</id>
                    <answer>No</answer>
                </question>
                <question>
                    <id>3</id>
                    <subquestions>
                        <subquestion>
                            <id>4</id>                           
                            <answer>Maybe</answer>
                        </subquestion>
                        <subquestion>
                            <id>5</id>                           
                            <answer>I don't know</answer>
                        </subquestion>
                    </subquestions>
                </question>
                ... more questions ...
            </survey_data>
        </result>
        <result>
            <id>67890</id>
            <date_submitted>2017-05-11 10:00:00</date_submitted>
            <url_variables>
                <respondent_id>
                    <key>respondent_id</key>
                    <value>34567</value>
                    <type>url</type>
                </respondent_id>
                <respondent_level>
                    <key>respondent_level</key>
                    <value>10</value>
                    <type>url</type>
                </respondent_level>
            </url_variables>
            <survey_data>
                <question>
                    <id>1</id>
                    <answer>No</answer>
                </question>
                <question>
                    <id>2</id>
                    <answer>Yes</answer>
                </question>
                <question>
                    <id>3</id>
                    <subquestions>
                        <subquestion>
                            <id>4</id>                           
                            <answer>Definitely not</answer>
                        </subquestion>
                        <subquestion>
                            <id>5</id>                           
                            <answer>I object</answer>
                        </subquestion>
                    </subquestions>
                </question>
                ... more questions ...
            </survey_data>
        </result>
        ... more results ...
    <data>
</survey>

我需要获取这些数据，分解 XML 以在每个 ResponseData 字段中获得多个结果，并将其放入两个表中，如下所示：

ResultId    SurveyId    RespondentId    RespondentLevel    DateSubmitted
--------    --------    ------------    ---------------    -------------
12345       11223344    987654          5                  2017-05-10 09:30:15
67890       11223344    34567           10                 2017-05-11 10:00:00
... 
(Data extracted from the rest of ImportId 1 followed by ImportId 2, 3, etc)

ResultId      QuestionId    SubquestionId    Answer
----------    ----------    -------------    ------
12345         1             0                Yes
12345         2             0                No
12345         3             4                Maybe
12345         3             5                I don't know
67890         1             0                No
67890         2             0                Yes
67890         3             4                Definitely not
67890         3             5                I object
 ... 
(Data extracted from the rest of ImportId 1 followed by ImportId 2, 3, etc)
4

1 回答 1

1

对于两个表，您需要两个查询

示例（我只使用了 1 条记录，但将适用于多条记录）

Declare @YourTable Table ([ImportId] int,[SurveyId] int,[DateImported] datetime,[ResponseData] xml)
Insert Into @YourTable Values
(1,11223344,'2017-05-21 18:00:00.00','<survey><data><result><id>12345</id><date_submitted>2017-05-10 09:30:15</date_submitted><url_variables><respondent_id><key>respondent_id</key><value>987654</value><type>url</type></respondent_id><respondent_level><key>respondent_level</key><value>5</value><type>url</type></respondent_level></url_variables><survey_data><question><id>1</id><answer>Yes</answer></question><question><id>2</id><answer>No</answer></question><question><id>3</id><subquestions><subquestion><id>4</id><answer>Maybe</answer></subquestion><subquestion><id>5</id><answer>I don''t know</answer></subquestion></subquestions></question></survey_data></result><result><id>67890</id><date_submitted>2017-05-11 10:00:00</date_submitted><url_variables><respondent_id><key>respondent_id</key><value>34567</value><type>url</type></respondent_id><respondent_level><key>respondent_level</key><value>10</value><type>url</type></respondent_level></url_variables><survey_data><question><id>1</id><answer>No</answer></question><question><id>2</id><answer>Yes</answer></question><question><id>3</id><subquestions><subquestion><id>4</id><answer>Definitely not</answer></subquestion><subquestion><id>5</id><answer>I object</answer></subquestion></subquestions></question></survey_data></result></data></survey>')

Select B.*
 From  @YourTable A
 Cross Apply (
                Select [ResultID]        = r.n.value('(id)[1]','int')
                      ,A.[SurveyId]
                      ,[RespondentId]    = r.n.value('(url_variables/respondent_id/value)[1]','int')
                      ,[RespondentLevel] = r.n.value('(url_variables/respondent_level/value)[1]','int')
                      ,[DateSubmitted]   = r.n.value('(date_submitted)[1]','datetime')
                 From  A.[ResponseData].nodes('survey/data/result') r(n)
             ) B


Select B.*
 From  @YourTable A
 Cross Apply (
                Select [ResultID]      = r.n.value('(id)[1]','int')
                      ,[QuestionId]    = IsNull(q.n.value('(id)[1]','int'),0)
                      ,[SubquestionId] = IsNull(s.n.value('(id)[1]','int'),0)
                      ,[answer]        = concat(q.n.value('(answer)[1]','varchar(50)') 
                                               ,s.n.value('(answer)[1]','varchar(50)') 
                                               )
                 From  A.[ResponseData].nodes('survey/data/result') r(n)
                 Cross Apply r.n.nodes('survey_data/question')      q(n)
                 Outer Apply q.n.nodes('subquestions/subquestion')  s(n)
             ) B

退货

在此处输入图像描述

于 2017-05-22T01:59:43.170 回答