Extract data from XML Clob using SQL from Oracle Database

Question

I want to extract the value of Decision using sql from table TRAPTABCLOB having column testclob with XML stored as clob.

Sample XML as below.

Answer 1

Try

SELECT EXTRACTVALUE(xmltype(testclob), '/DCResponse/ContextData/Field[@key="Decision"]') 
FROM traptabclob;

Here is a sqlfiddle demo

Answer 2

This should work

SELECT EXTRACTVALUE(column_name, '/DCResponse/ContextData/Decision') FROM traptabclob;

I have assumed the ** were just for highlighting?