sql - Remove special character from end of string -


i looking remove special characters end of string.

input:

looking oracle ~( looking ~! oracle ~( stack looking ~! oracle ~( stack ##

output:

looking oracle looking ~! oracle ~( stack looking ~! oracle ~( stack

so need remove non-alphanumeric characters end of string only.

i looking oracle sql query achieve this.

select regexp_replace(str, '[^[:alnum:]]*$') from....

where str input string value. remove non-alphanumeric characters @ end of str ($ anchoring @ end; * means many possible consecutive characters; [...] means character matching set, , ^ within character matching set means negation). not giving third argument regexp_replace(), substring replaced nothing ('')


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