Newbie Needs some help!

I have a table that has multiple columns, but what I'm trying to do is stumping me.

In the ATTRIBUTES column, I need the following entry: (just as it is, quotes and all)

<?xml version="1.0" encoding="UTF-8" standalone="no"?><!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd"><properties><entry key="BUYCREDIT">0.8</entry><entry key="BUYCASH">0.15</entry></properties>

I need it to generate with a trigger based on two other columns in the table. The 0.8 is in the column "credittradevalue" while the 0.15 is in the column called "cashtradevalue"


I would appreciate any help with this!!