XML:selecting the value of a xml tag using plsql

Hi,
I have a table xx_table with one of the column xx_column which is of type XMLTYPE.I inserted the xml data into this column with xml data as below.
<userComments xmlns:ns1="http://xmlns.oracle.com/XXXX_AccountDistribution"
xmlns="http://xmlns.oracle.com/XXXXX_AccountDistribution">
<task:userComment
xmlns:task="http://xmlns.oracle.com/bpel/workflow/task">
<task:comment>*********** Rejecting invoice **********</task:comment>
<task:updatedBy>
<task:id>r</task:id>
<task:displayName></task:displayName>
<task:systemVersionFlag></task:systemVersionFlag>
</task:updatedBy>
<task:updatedDate>2010-05-19T14:09:15-07:00</task:updatedDate>
<task:displayNameLanguage></task:displayNameLanguage>
<task:action></task:action>
<task:systemVersionFlag></task:systemVersionFlag>
</task:userComment>
</userComments>
My question ,how do i select the value of the tag "comment" from the above xml data using plsql? Can we write a query to select the value of the tag "comment" to fetch "*********** Rejecting invoice **********" as value.
Regards,
Sandeep

If you have rights to modify tabular model then, you can create a measure in your Tabular model which returns previous week and then use this measure in Pivot Table.
Thanks,
Sagar K
(Blog: http://datamazik.blogspot.in/)

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XML:selecting the value of a xml tag using plsql

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