Question

我正在尝试从XML文件中提取数据，并使用SQL Server中的OPENXML将其存储到SQL表中。但是，查询什么也不返回。

XML数据

 SELECT distinct  substr(userId , -(length(userID)-2))
  from  UserName where userId like 'AB%';

SQL查询

<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<xsd:schema targetNamespace="urn:schemas-microsoft-com:sql:SqlRowSet1" xmlns:schema="urn:schemas-microsoft-com:sql:SqlRowSet1" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sqltypes="http://schemas.microsoft.com/sqlserver/2004/sqltypes" elementFormDefault="qualified">
    <xsd:import namespace="http://schemas.microsoft.com/sqlserver/2004/sqltypes" schemaLocation="http://schemas.microsoft.com/sqlserver/2004/sqltypes/sqltypes.xsd"/>
    <xsd:element name="ogridroles">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="ogrid_cde" type="sqltypes:int" nillable="1"/>
                <xsd:element name="role" nillable="1">
                    <xsd:simpleType>
                        <xsd:restriction base="sqltypes:char" sqltypes:localeId="1033" sqltypes:sqlCompareOptions="IgnoreCase IgnoreKanaType IgnoreWidth" sqltypes:sqlSortId="52">
                            <xsd:maxLength value="1"/>
                        </xsd:restriction>
                    </xsd:simpleType>
                </xsd:element>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
</xsd:schema>
<ogridroles xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
    <ogrid_cde>28</ogrid_cde>
    <role>T</role>
</ogridroles>
<ogridroles xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
    <ogrid_cde>75</ogrid_cde>
    <role>T</role>
</ogridroles>
<ogridroles xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
    <ogrid_cde>93</ogrid_cde>
    <role>O</role>
</ogridroles>
<ogridroles xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
    <ogrid_cde>135</ogrid_cde>
    <role>O</role>
</ogridroles>
</root>

我要提取元素的所有行值

ogrid_cde
角色

Answer 1

我对架构不是很好，并使用另一种方式来解码XML：

UIApplication.LaunchOptionsKey

Answer 2

通过FROM OPENXML进行的处理（连同准备和删除文档的过程一起使用）已过时，不再应使用。

native methods of the XML-type更好。试试这个：

您的XML

DECLARE @xml XML=
N'<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <xsd:schema xmlns:schema="urn:schemas-microsoft-com:sql:SqlRowSet1" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sqltypes="http://schemas.microsoft.com/sqlserver/2004/sqltypes" targetNamespace="urn:schemas-microsoft-com:sql:SqlRowSet1" elementFormDefault="qualified">
    <xsd:import namespace="http://schemas.microsoft.com/sqlserver/2004/sqltypes" schemaLocation="http://schemas.microsoft.com/sqlserver/2004/sqltypes/sqltypes.xsd" />
    <xsd:element name="ogridroles">
      <xsd:complexType>
        <xsd:sequence>
          <xsd:element name="ogrid_cde" type="sqltypes:int" nillable="1" />
          <xsd:element name="role" nillable="1">
            <xsd:simpleType>
              <xsd:restriction base="sqltypes:char" sqltypes:localeId="1033" sqltypes:sqlCompareOptions="IgnoreCase IgnoreKanaType IgnoreWidth" sqltypes:sqlSortId="52">
                <xsd:maxLength value="1" />
              </xsd:restriction>
            </xsd:simpleType>
          </xsd:element>
        </xsd:sequence>
      </xsd:complexType>
    </xsd:element>
  </xsd:schema>
  <ogridroles xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
    <ogrid_cde>28</ogrid_cde>
    <role>T</role>
  </ogridroles>
  <ogridroles xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
    <ogrid_cde>75</ogrid_cde>
    <role>T</role>
  </ogridroles>
  <ogridroles xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
    <ogrid_cde>93</ogrid_cde>
    <role>O</role>
  </ogridroles>
  <ogridroles xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
    <ogrid_cde>135</ogrid_cde>
    <role>O</role>
  </ogridroles>
</root>';

-查询

WITH XMLNAMESPACES(DEFAULT 'urn:schemas-microsoft-com:sql:SqlRowSet1')
SELECT OgrRol.value('(ogrid_cde/text())[1]','int') AS ogrid_cde
      ,OgrRol.value('(role/text())[1]','nvarchar(10)') AS [role]
FROM @xml.nodes('/*:root/ogridroles') A(ogrRol);

结果

ogrid_cde   role
28          T
75          T
93          O
135         O

简短说明

您可以在此处忽略XML模式。为了检查数据完整性和有效性，这将很有用。但是假设数据正确，我们就可以读取它。

有一个（重复定义的）默认名称空间。但是-这很重要！-元素<root>本身不在该命名空间中！

容易，我只是使用了 namespace通配符来用*:root来解决这个元素。通常，最好避免使用通配符，但是在这种情况下，这似乎可以接受。

我们使用.nodes()来获取所有<ogridroles>元素的派生表。然后，我们.value()读取代码和角色元素的text()节点。

希望这对您有所帮助，编码愉快！

在SQL Server中使用OPENXML使用内联架构解析XML文件

2 个答案:

简短说明