How to extract a single colum form XML files and load in a table

Question

Hi below I have a structure of xml files , I just need to extarct <RecordReference>PQPMID:7358</RecordReference>
from file and load in to oracle ..
Please let me know how to do ..??
file content below
HoldingsRecord>
     <RecordReference>PQPMID:7358</RecordReference>
     <NotificationType>00</NotificationType>
     <SerialVersion>
          <SerialVersionIdentifier>
               <SerialVersionIDType>07</SerialVersionIDType>
               <IDValue>1068624X</IDValue>
          </SerialVersionIdentifier>
          <SerialVersionIdentifier>
               <SerialVersionIDType>01</SerialVersionIDType>
               <IDTypeName>PMID</IDTypeName>
               <IDValue>7358</IDValue>
          </SerialVersionIdentifier>
          <Title>
               <TitleType>02</TitleType>
               <TitleText>Pittsburgh Post - Gazette</TitleText>
          </Title>
          <Publisher>
               <PublishingRole>01</PublishingRole>
               <PublisherName>Post Gazette Publishing Company</PublisherName>
          </Publisher>
          <OnlinePackage>
               <OnlineServiceName>ProQuest</OnlineServiceName>
               <Website>
                    <WebsiteRole>03</WebsiteRole>
                    <WebsiteLink>http://proquest.umi.com/pqdweb</WebsiteLink>
               </Website>
               <HoldingsDetail>
                    <JournalIssue>
                         <JournalIssueRole>04</JournalIssueRole>
                         <JournalIssueDate>
                              <DateFormat>00</DateFormat>
                              <Date>19930118</Date>
                         </JournalIssueDate>
                    </JournalIssue>
                    <JournalIssue>
                         <JournalIssueRole>06</JournalIssueRole>
                         <JournalIssueDate>
                              <DateFormat>00</DateFormat>
                              <Date>20080915</Date>
                         </JournalIssueDate>
                    </JournalIssue>
                    <EpubFormat>10</EpubFormat>
               </HoldingsDetail>
          </OnlinePackage>
     </SerialVersion>
</HoldingsRecord>

Answer 1

DECLARE
  l_clob    CLOB;
  l_bfile   BFILE;
  l_parser  dbms_xmlparser.Parser;
  l_doc     dbms_xmldom.DOMDocument;
  l_nl      dbms_xmldom.DOMNodeList;
  l_n       dbms_xmldom.DOMNode;
  l_temp    VARCHAR2(1000);
src_csid       NUMBER := NLS_CHARSET_ID('UTF8'); 
dest_offset    INTEGER := 1;
src_offset     INTEGER := 1;
lang_context   INTEGER := dbms_lob.default_lang_ctx;
warning        INTEGER;
  TYPE tab_type IS TABLE OF gt_pq_pmid%ROWTYPE;
  t_tab  tab_type := tab_type();
BEGIN
  l_bfile := BFileName('XML_DIR', 'SOH_sample.xml');
  dbms_lob.createtemporary(l_clob, cache=>FALSE);
  dbms_lob.open(l_bfile, dbms_lob.lob_readonly);
  dbms_lob.loadclobfromFile(  l_clob,
                          l_bfile,
                         dbms_lob.getLength(l_bfile),
                        dest_offset,
                        src_offset,
                        src_csid,
                        lang_context,
                        warning);
  dbms_lob.close(l_bfile);
  dbms_session.set_nls('NLS_DATE_FORMAT','''DD-MON-YYYY''');
      l_parser := dbms_xmlparser.newParser;
  dbms_xmlparser.parseClob(l_parser, l_clob);
  l_doc := dbms_xmlparser.getDocument(l_parser);
  dbms_lob.freetemporary(l_clob);
  dbms_xmlparser.freeParser(l_parser);
  -- Get a list of all the row  nodes in the document using the XPATH syntax.
  l_nl := dbms_xslprocessor.selectNodes(dbms_xmldom.makeNode(l_doc),'HoldingsRecord/');
  FOR cur_stage_xml IN 0 .. dbms_xmldom.getLength(l_nl) - 1 LOOP
    l_n := dbms_xmldom.item(l_nl, cur_stage_xml);
    t_tab.extend;
     dbms_xslprocessor.valueOf(l_n,'RecordReference/text()',t_tab(t_tab.last).pq_pmid);
  END LOOP;
  FOR cur_stage_xml IN t_tab.first .. t_tab.last LOOP
    INSERT INTO
      gt_pq_pmid (
       pq_pmid   )
    VALUES
    (t_tab(cur_stage_xml).pq_pmid);
  END LOOP;
  COMMIT;
  dbms_xmldom.freeDocument(l_doc);
EXCEPTION
  WHEN OTHERS THEN
    dbms_lob.freetemporary(l_clob);
    dbms_xmlparser.freeParser(l_parser);
    dbms_xmldom.freeDocument(l_doc);
raise ;
END;---------- and i am getting below error
ERROR at line 1:
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00210: expected '<' instead of 'H'
Error at line 1
ORA-06512: at line 65