Question

我在DB字段中存储了以下XML数据：

<FM>
<SectionsList>
<Section>
<SectionId>Section_one</SectionId>
</Section>
<Section>
<SectionId>Section_two</SectionId> 
<Fields>
<FormField>
<FieldId>REQUESTID</FieldId>
<FieldValue>ABC1234</FieldValue>
</FormField>
<FormField>
<FieldId>REQUESTNAME</FieldId>
<FieldValue>JASMINE</FieldValue>
</FormField>
</Fields>
</Section>
</SectionsList>
</FM>

我想从FieldValue FormField的部分中检索FieldId REQUESTNAME SectionId Section_two个JASMINE的值。结果应为SELECT EXTRACTVALUE(xmltype(req_details), '/FM/SectionsList/Section[@SectionId="Section_two"]/Fields/FormField/FieldValue[@FieldId="REQUESTNAME"]') from table。

我在Oracle中执行查询：

template: "# if(data.Code != '')" +
          "{# #:data.Name# (#:data.Code#) #}" +
          "else {# #:data.Name# #} #"

但结果是NULL。我如何在Oracle中提取值？

Answer 1

您对属性和节点选择感到困惑。 $array = [ "Japan" => "Tokyo Shibuya Office", "Taiwan" => "Taipei Shilin Office", "Korea" => "Seoul Yongsan Office", "Singapore" => "Singapore Novena Office", "Australia" => "Sydney Darlinghurst Office" ]; $define_array = serialize($array); define( "OUROFFICE", $define_array ); $our_office = unserialize(OUROFFICE); print_r($our_office);不是该部分的属性，这是您SectionId正在寻找的内容。

您可以通过识别节点文本值并向后走树来完成此操作：

[@SectionId=...]

不推荐使用

或select extractvalue(xmltype(req_details), '/FM/SectionsList/Section/SectionId[text()="Section_two"]/../Fields/FormField/FieldId[text()="REQUESTNAME"]/../FieldValue') as result from your_table RESULT -------------------- JASMINE，而是使用XMLQuery：

extractvalue()

或者使用更明确的XPath，避免不得不走回树上（因此更容易理解，更难以迷失）：

select xmlquery(
  '/FM/SectionsList/Section/SectionId[text()="Section_two"]/../Fields/FormField/FieldId[text()="REQUESTNAME"]/../FieldValue/text()'
  passing xmltype(req_details)
  returning content) as result
from your_table


RESULT              
--------------------
JASMINE

使用oracle从clob字段中提取xml标记值

1 个答案: