Those all looks like zeros.
Try replacing the zeros with spaces
string = translate(string,' ','00'x);
and then re-check to see if there are other characters.
Thanks @Tom . rechecked i can see the below character values in output data. can i use translate function to resolve the both cases please
Sure. The TRANSLATE() function matches the two lists of characters by position. So to map both the '00'x and the 'FF'x characters to spaces use:
string = translate(string,' ','00FF'x);
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