Searching for phone numbers in mysql

Question

I have a table which is full of arbitrarily formatted phone numbers, like this

027 123 5644
021 393-5593
(07) 123 456
042123456

I need to sea

Answer 1

a possible solution can be found at http: //udf-regexp.php-baustelle.de/trac/

additional package need to be installed, then you can play with REGEXP_REPLACE