David,
>Regular Expressions are your friend here.  If you do not know them you should 
>learn them; though if you ask nicely someone may just provide you the solution 
>you need.
>Split-to-array and unnest may work as well.

Thank you very much. I don’t know regexps.
Can you provide example, please for 8.1. Or maybe CASE WHEN and substring 
testing can also used.

Andrus.

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