How do I extract a value from an XML column in SQL Server

问题

I have a column SCORERESULTS in table CSE_ARCHIVEDCREDITSCORE.

Score results is an XML column.

<ScoringEngine>
  <Profile id="Navigation" version="1" num="4" uniqueId="8bcf8a8b9efc4e5dad1d87510cfe6a64">
.
.
.
    <Tool id="Payment To Income Ratio" version="1" old_id="Pmt_To_Income">
      <Rule id="PaymentIncomeRatio" version="1" old_id="PTI">
        <Row uniqueId="0fb11598c4224e4c97cf2afcc4e34b54" order="6" id="0">
          <Column order="1" op="RNG2" start="0.18" end="0.2" title="Payment To Income Ratio">0.190325139</Column>
          <Action name="Record Value" value="1.42085235920852" fieldName="LO_R_PMT_TO_INCOME" />
        </Row>
      </Rule>
      <RecordedValue>
        <Value value="1.42085235920852" fieldName="LO_R_PMT_TO_INCOME" />
      </RecordedValue>
    </Tool>
    <Tool id="RecentLoans" version="2">
      <Rule id="RecentLoans" version="2" old_id="RecentLoans" />
    </Tool>
.
.
.
  </Profile>
</ScoringEngine>

I am trying to get the value 0.190325139 out of the XML line: <Column order="1" op="RNG2" start="0.18" end="0.2" title="Payment To Income Ratio">0.190325139</Column> I am clueless on how to pull it. I'm not familiar with XML, or really how to navigate it well.

回答1:

You can use the below query. Make sure the column SCORERESULTS is of type XML.

SELECT SCORERESULTS.value('(ScoringEngine/Profile/Tool/Rule/Row/Column)[1]', 'nvarchar(MAX)') AS result
FROM CSE_ARCHIVEDCREDITSCORE

If the column is not of type XML use the below query

SELECT CAST(SCORERESULTS AS XML).value('(ScoringEngine/Profile/Tool/Rule/Row/Column)[1]', 'nvarchar(MAX)') AS result
FROM CSE_ARCHIVEDCREDITSCORE

回答2:

You can try the following approach.

XPath predicate is filtering out not needed <Tool> elements.

SQL

-- DDL and sample data population, start
DECLARE @tbl TABLE (ID INT IDENTITY PRIMARY KEY, xmldata XML);
INSERT INTO @tbl (xmldata)
VALUES
(N'<ScoringEngine>
    <Profile id="Navigation" version="1" num="4"
             uniqueId="8bcf8a8b9efc4e5dad1d87510cfe6a64">
        <Tool id="Payment To Income Ratio" version="1" old_id="Pmt_To_Income">
            <Rule id="PaymentIncomeRatio" version="1" old_id="PTI">
                <Row uniqueId="0fb11598c4224e4c97cf2afcc4e34b54" order="6"
                     id="0">
                    <Column order="1" op="RNG2" start="0.18" end="0.2"
                            title="Payment To Income Ratio">0.190325139</Column>
                    <Action name="Record Value" value="1.42085235920852"
                            fieldName="LO_R_PMT_TO_INCOME"/>
                </Row>
            </Rule>
            <RecordedValue>
                <Value value="1.42085235920852" fieldName="LO_R_PMT_TO_INCOME"/>
            </RecordedValue>
        </Tool>
        <Tool id="RecentLoans" version="2">
            <Rule id="RecentLoans" version="2" old_id="RecentLoans"/>
        </Tool>
    </Profile>
</ScoringEngine>');
-- DDL and sample data population, end

SELECT tbl.ID
    , c.value('(Rule/Row/Column/text())[1]','DECIMAL(10,8)') AS [value]
FROM @tbl AS tbl
    CROSS APPLY xmldata.nodes('/ScoringEngine/Profile/Tool[@id="Payment To Income Ratio"]') AS t(c);

Output

+----+------------+
| ID |   value    |
+----+------------+
|  1 | 0.19032514 |
+----+------------+

来源：https://stackoverflow.com/questions/63285429/how-do-i-extract-a-value-from-an-xml-column-in-sql-server

标签

sql

sql-server

xml