ORA-19279: dynamic type mismatch query: wait for the singleton sequence

Hello
I have my xml stored in the table "xml_table".
The content of the XML is:

< COMPANY NAME = 'ABC' >
Paris < DEPARTMENT_NAME > < / DEPARTMENT_NAME >
< ADDRESS > Nevers Street < / ADDRESS >
London < DEPARTMENT_NAME > < / DEPARTMENT_NAME >
Northampton square < ADDRESS > < / ADDRESS >
< / COMPANY >

I would like to query the XML to get the result like this:

COMPANY_NAME | DEPARTMENT_NAME | ADDRESS

ABC | Paris | Street of nevers
ABC | London | Northampton square

However when I run the query:

SELECT t.company_name, t.address, t.department_name
Xml_table p,
XMLTable ('/ COMPANY' ADOPTION p.OBJECT_VALUE)
COLUMNS company_name PATH "@NAME."
address PATH of VARCHAR2 (100) "/ COMPANY/ADDRESS.
department_name PATH VARCHAR2 (100) "/ COMPANY/DEPARTMENT_NAME ') t

I get the error message:
ORA-19279: XPTY0004 - dynamic XQuery type mismatch: expected - singleton sequence got several sequence element

What can be wrong with the query? Should Howe be modified to achieve the desired result?

Thanks for the help

Groxy

Hello

What can be wrong with the query?

The XPath expression that you use to map DEPARTMENT_NAME and columns ADDRESS corresponds to a sequence of elements, not a single value.
For example, "/ COMPANY/ADDRESS" means:

Rue de nevers
Northampton Square

In fact, your XML structure is not very suitable for a relational presentation.
IMO, it would be easier to deal with this form:


  
    Paris
    
Rue de nevers
London
Northampton Square

Like this, you can easily break SERVICE items in separate lines with a simple XPath.

That being said, perhaps that you have no choice, so here's a query do you want:

SELECT t.company_name, t.address, t.department_name
FROM xml_table p,
     XMLTable(
      'for $i in /COMPANY/DEPARTMENT_NAME
       return 
       {
        $i/../@NAME,
        $i,
        $i/following-sibling::ADDRESS[1]
       }
       '
      PASSING p.OBJECT_VALUE
      COLUMNS company_name    VARCHAR2(30)  PATH '@NAME',
              address         VARCHAR2(100) PATH 'ADDRESS',
              department_name VARCHAR2(100) PATH 'DEPARTMENT_NAME'
     ) t
;

Each 'virtual' line is built in the XQuery by searching for each DEPARTMENT_NAME and its first element following ADDRESS.

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      See the article below for more information.
      How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7
      http://support.Microsoft.com/kb/929135
      Note: When the diagnosis is complete, don't forget to reset your computer to normal startup. Follow step 7 in the above article.

      I hope this helps.

      Thank you, and in what concerns:
      Shekhar S - Microsoft technical support.

      Visit our Microsoft answers feedback Forum and let us know what you think.
      If this post can help solve your problem, please click the 'Mark as answer' or 'Useful' at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.

    8. BlackBerry Q10 in waiting for the new Q10 hit sprint but what will happen to my email?

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