Comments on: Producing XML from SQL using cursor expressions http://awads.net/wp/2005/12/19/producing-xml-from-sql-using-cursor-expressions/ News, views, tips and tricks on Oracle and other fun stuff Mon, 08 Sep 2008 17:22:34 +0000 http://wordpress.org/?v=2.5 By: OraQA » Blog Archive » How to Generate XML Data from the Database http://awads.net/wp/2005/12/19/producing-xml-from-sql-using-cursor-expressions/#comment-5033 OraQA » Blog Archive » How to Generate XML Data from the Database Thu, 27 Apr 2006 20:01:54 +0000 http://awads.net/wp/?p=182#comment-5033 <p>[...] Producing XML from SQL using cursor expressions [...]</p> […] Producing XML from SQL using cursor expressions […]

]]> By: IT-eye Weblog » XML queries and cursor expressions http://awads.net/wp/2005/12/19/producing-xml-from-sql-using-cursor-expressions/#comment-488 IT-eye Weblog » XML queries and cursor expressions Tue, 20 Dec 2005 08:13:56 +0000 http://awads.net/wp/?p=182#comment-488 <p>[...] Eddie Awad has an interesting post on generating xml using cursor expressions: Producing XML from SQL using cursor expressions. Be sure to also read Aino’s comment, where he shows how you can achieve the same thing but using the xmlelement and xmlagg functions. [...]</p> […] Eddie Awad has an interesting post on generating xml using cursor expressions: Producing XML from SQL using cursor expressions. Be sure to also read Aino’s comment, where he shows how you can achieve the same thing but using the xmlelement and xmlagg functions. […]

]]> By: Aino Andriessen http://awads.net/wp/2005/12/19/producing-xml-from-sql-using-cursor-expressions/#comment-486 Aino Andriessen Mon, 19 Dec 2005 17:32:59 +0000 http://awads.net/wp/?p=182#comment-486 <p>I think it's available for 9iR2 and up. By the way, this is part of the SQL2003 standard :-). Check out: http://download-uk.oracle.com/docs/cd/B19306_01/appdev.102/b14259/xdb13gen.htm#g1047191 As of 10gR2 you can also use XQuery, but I do not have any experince with that. My first impression was that I understand SQLXML better.</p> I think it’s available for 9iR2 and up. By the way, this is part of the SQL2003 standard :-).
Check out: http://download-uk.oracle.com/docs/cd/B19306_01/appdev.102/b14259/xdb13gen.htm#g1047191
As of 10gR2 you can also use XQuery, but I do not have any experince with that. My first impression was that I understand SQLXML better.

]]> By: Eddie Awad http://awads.net/wp/2005/12/19/producing-xml-from-sql-using-cursor-expressions/#comment-485 Eddie Awad Mon, 19 Dec 2005 17:05:58 +0000 http://awads.net/wp/?p=182#comment-485 Aino, this is great, thanks. I ran your example above for department id 20 and 110 and got the following output: <company> <department> <name>Marketing</name> <emps> <employee id = "201"> <first_name>Michael</first_name> </employee> <employee id = "202"> <first_name>Pat</first_name> </employee> </emps> </department> <department> <name>Accounting</name> <emps> <employee id = "205"> <first_name>Shelley</first_name> </employee> <employee id = "206"> <first_name>William</first_name> </employee> </emps> </department> </company> <p>I believe that <code>SQLXML</code> should work in 9i and 10g but not 8i.</p> <p>Oh! by the way, the backslashes are added by Markdown. I tried, but I could not get rid of them. Sometimes Markdown is bad :(</p> Aino, this is great, thanks. I ran your example above for department id 20 and 110 and got the following output:



Marketing


Michael


Pat




Accounting


Shelley


William



I believe that SQLXML should work in 9i and 10g but not 8i.

Oh! by the way, the backslashes are added by Markdown. I tried, but I could not get rid of them. Sometimes Markdown is bad :(

]]> By: Aino Andriessen http://awads.net/wp/2005/12/19/producing-xml-from-sql-using-cursor-expressions/#comment-484 Aino Andriessen Mon, 19 Dec 2005 15:12:32 +0000 http://awads.net/wp/?p=182#comment-484 <p>Sorry, but the backslashes in my previous comment should not be there.</p> Sorry, but the backslashes in my previous comment should not be there.

]]> By: Aino Andriessen http://awads.net/wp/2005/12/19/producing-xml-from-sql-using-cursor-expressions/#comment-483 Aino Andriessen Mon, 19 Dec 2005 15:09:59 +0000 http://awads.net/wp/?p=182#comment-483 Nice example, good thinking, I remember having this problem in the early Oracle XML days. With recent database versions however I would suggest to use SQLXML. It has more options, is more flexible and (in my opinion) easier. Your example would be something like: <pre> select xmlelement ("company", xmlagg (xmlelement ("department", xmlelement ("name", dept.department_name), xmlelement ("emps", (select xmlagg (xmlelement ("employee", xmlattributes (emp.employee_id as "id"), xmlforest (emp.first_name as "first_name"))) from employees emp where emp.department_id = dept.department_id) ) ) ) ) xml from departments dept </pre> Nice example, good thinking, I remember having this problem in the early Oracle XML days.
With recent database versions however I would suggest to use SQLXML. It has more options, is more flexible and (in my opinion) easier. Your example would be something like:

select  xmlelement ("company",
           xmlagg (xmlelement ("department",
           xmlelement ("name", dept.department_name),
           xmlelement ("emps",
             (select xmlagg (xmlelement ("employee",
               xmlattributes (emp.employee_id as "id"),
               xmlforest (emp.first_name as "first_name")))
             from    employees emp
             where emp.department_id = dept.department_id)
                       )
                   )
           )
       ) xml
from departments dept
]]>