In a table I have characteres fields as:

11111111
22222222
33333-000
44444.000
55555555
66666-000

My customers freely typed but now I want to standar and format this field, but I have a large amount of data to check and format

How can I tranform all in 8 digits characteres fields by removing the points,
"-" or "/" or other things that are not numbers ?

Moises