How to clean up phone-numbers with regex?

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From: Andreas <maps.on@gmx.net>
To: pgsql-sql@postgresql.org
Subject: How to clean up phone-numbers with regex?
Date: Mon, 19 May 2014 10:54:25 +0200
Message-ID: <5379C6C1.5020904@gmx.net> (raw)
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Hi

I need to clean up phone-numbers. Somehow I got a Excel list that has 
weird graphical characters trailing some of the entries.
My DB is UTF8 so it would store this mess but I don't like to import it 
in the first place.

OK, I know how to read the stuff into a temporary table to clean it up 
before the actual import.
How can I do an update on the column that deletes every char that is not 
in a given set of chars like '+- 0123456/()'?

Second but similar question:
How can I select records that have fields that contain characters not 
included in a given alphabet?
E.G. find fields that contain some char not in 0-9,a-z,A-Z, +-()/?

regards
Andreas

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