Question

＆＃34;我有一个xml字段，其中包含以下值：

<table>
  <id>{cdf8cafc-2b3c-454b-aab8-c6c27e96b675}</id>
  <rows>
    <row>
      <columns>
        <column name="po_desc" value="Item-1" type="System.String" />
        <column name="Qty" value="15" type="System.Int32" />
        <column name="price" value="100" type="System.Decimal" />
        <column name="linetotal" value="1500" type="System.Decimal" />
        <column name="DefaultKey" value="1" type="System.Int32" />
      </columns>
    </row>
    <row>
      <columns>
        <column name="po_desc" value="" type="System.String" />
        <column name="Qty" value="1" type="System.Int32" />
        <column name="price" value="1" type="System.Decimal" />
        <column name="linetotal" value="1" type="System.Decimal" />
        <column name="DefaultKey" value="2" type="System.Int32" />
      </columns>
    </row>
</rows>
</table>

我需要将其转换为行和列，如下所示

PO_desc    Qty    Price   LineTotal  
=====================================
item-1      15    100      1500
Item-2       1      1       1
=======================================

使用MS SQL查询。

Answer 1

尝试这样

DECLARE @DummyTable TABLE(ID INT IDENTITY, YourXmlColumn XML);
INSERT INTO @DummyTable VALUES
('<table>
  <id>{cdf8cafc-2b3c-454b-aab8-c6c27e96b675}</id>
  <rows>
    <row>
      <columns>
        <column name="po_desc" value="Item-1" type="System.String" />
        <column name="Qty" value="15" type="System.Int32" />
        <column name="price" value="100" type="System.Decimal" />
        <column name="linetotal" value="1500" type="System.Decimal" />
        <column name="DefaultKey" value="1" type="System.Int32" />
      </columns>
    </row>
    <row>
      <columns>
        <column name="po_desc" value="" type="System.String" />
        <column name="Qty" value="1" type="System.Int32" />
        <column name="price" value="1" type="System.Decimal" />
        <column name="linetotal" value="1" type="System.Decimal" />
        <column name="DefaultKey" value="2" type="System.Int32" />
      </columns>
    </row>
</rows>
</table>');

这是查询

SELECT r.value('(columns/column[@name="po_desc"]/@value)[1]','nvarchar(max)') AS PO_Desc
      ,r.value('(columns/column[@name="Qty"]/@value)[1]','int') AS Qty
      ,r.value('(columns/column[@name="price"]/@value)[1]','decimal') AS Price
      ,r.value('(columns/column[@name="linetotal"]/@value)[1]','decimal') AS LineTotal
FROM @DummyTable AS t
CROSS APPLY t.YourXmlColumn.nodes('/table/rows/row') AS A(r);

使用SQL将XML值转换为表

1 个答案: