从SQL中选择数据来自SQL

Question

我无法从保存在SQL Server数据库中的XML文本中获取一些数据。我的数据如下：

<retConsReciCTe xmlns="http://www.portalfiscal.inf.br/cte" versao="3.00"> 
 
    <tpAmb>2</tpAmb> 
 
    <verAplic>SP-CTe-25-05-2017</verAplic> 
 
    <nRec>351000011484798</nRec> 
 
    <cStat>104</cStat> 
 
    <xMotivo>Lote processado</xMotivo> 
 
    <cUF>35</cUF> 
 
    <protCTe versao="3.00"> 
 
    <infProt> 
 
     <tpAmb>2</tpAmb> 
 
     <verAplic>SP-CTe-25-05-2017</verAplic> 
 
     <chCTe>35170623838348000310570000000058731000058731</chCTe> 
 
     <dhRecbto>2017-06-22T21:28:18-03:00</dhRecbto> 
 
     <cStat>232</cStat> 
 
     <xMotivo>Rejeição: IE do destinatário não informada</xMotivo> 
 
    </infProt> 
 
    </protCTe> 
 
</retConsReciCTe>

我要选择仅在内容。出于这个原因，我运行下面的查询：

select top 10 retorno_sefaz_doc.value('(/retConsReciCTe/@xmln)[1]','varchar(10)') as [retorno] from documentos

而我的回报始终是NULL。有人可以轻轻地帮我告诉我出了什么问题？

Answer 1

你可以定义一个默认的命名空间和value得到输出这样

DECLARE @SampleData AS TABLE 
(
    XmlValue xml 
) 

INSERT INTO @SampleData 
(
    XmlValue 
) 
VALUES 
(N'<retConsReciCTe xmlns="http://www.portalfiscal.inf.br/cte" versao="3.00"> 
    <tpAmb>2</tpAmb> 
    <verAplic>SP-CTe-25-05-2017</verAplic> 
    <nRec>351000011484798</nRec> 
    <cStat>104</cStat> 
    <xMotivo>Lote processado</xMotivo> 
    <cUF>35</cUF> 
    <protCTe versao="3.00"> 
    <infProt> 
     <tpAmb>2</tpAmb> 
     <verAplic>SP-CTe-25-05-2017</verAplic> 
     <chCTe>35170623838348000310570000000058731000058731</chCTe> 
     <dhRecbto>2017-06-22T21:28:18-03:00</dhRecbto> 
     <cStat>232</cStat> 
     <xMotivo>Rejeição: IE do destinatário não informada</xMotivo> 
    </infProt> 
    </protCTe> 
</retConsReciCTe>') 

;WITH XMLNAMESPACES (default 'http://www.portalfiscal.inf.br/cte') 
select sd.XmlValue.value('(/retConsReciCTe/@versao)[1]','varchar(20)') 
                  AS Versao 
FROM @SampleData sd 

返回

Versao 
3.00