Masking last characters with *

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Hi all,

I'm trying to mask last 4 digits of the telephone numbers. Due to the no fixed length of the telephone numbers, I can't use segment mapping relying on the segment length. How can I substitute the last 4 digits independently from the length of the value?

Let me write some sample values and what I'd like to obtain:

Original values to mask:

What I'd like to get:

Any help would be sincerely appreciated.
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Gianpiero Piccolo

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Posted 3 years ago

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David Newman

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Official Response
The easiest way would be to put this in a post script.  Something like update table set phone= SUBSTR(phone,1,legnth(phone)-4+"****".  This might not be the exact SQL