How to count elements in a XMLTYPE of the same type?

Hi.
Imagine i have this inside a xmltype :
<world>Mercury</world>
<world>Venus</world>
<world>Earth</world>
<world>Mars</world>
Is there a way to query the xmltype (fast way) to return me 4 ?
Cheers!

Hello Everyone,
I have similar XML code but with more nodes within the nodes.
<root>
<world>
<moons>A</moons>
<moons>B</moons>
<moons>C</moons>
</world>
<world></world>
<world>
<moons>A</moons>
</world>
<world>
<moons>A</moons>
<moons>B</moons>
</world>
</root>
I can find out number of worlds count, which in this case is 4.
My problem is how to count number of moons for each world. I don't want the total moon count which is 6.
I want counts for World1 - 3, World2 - 0, World3 - 1, World4 - 2.
I am trying to retrieve the individual count like this
SELECT column_value INTO World_count
FROM XMLTable('count (//world)' PASSING xmltype ('<root>
<world>
<moons>A</moons>
<moons>B</moons>
<moons>C</moons>
</world>
<world></world>
<world>
<moons>A</moons>
</world>
<world>
<moons>A</moons>
<moons>B</moons>
</world>
</root>');
DBMS_OUT ('World Count:' || World_count);
For i IN 1 .. World_count
loop
SELECT column_value INTO moon_count
FROM XMLTable('count (//world/moon)' PASSING xmltype ('<root>
<world>
<moons>A</moons>
<moons>B</moons>
<moons>C</moons>
</world>
<world></world>
<world>
<moons>A</moons>
</world>
<world>
<moons>A</moons>
<moons>B</moons>
</world>
</root>');
DBMS_OUT ('For World : ' || i );
DBMS_OUT ('Moon Count is :' || moon_count);
end loop;
But its not giving me the right answer. Is my approach to the problem correct or do I need to do something else.
Please advice
Edited by: [email protected] on Mar 17, 2009 2:19 PM
Edited by: [email protected] on Mar 17, 2009 2:22 PM

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