How can I reference a variable in Regexp

Hello Friends,
I have this Regexp, to extract the county code: (971)
select regexp_replace (regexp_replace('000971-05 7910 - 324324','\D'),'^0*(971)?0?') from dual;It is fine and does the need..
But, thinking in the future, someone may need to eliminate the country code of (961), so it is better if I put the code in a variable, but
How can I reference the county code using a variable in Regexp:
declare
a varchar2 (15);
code number := 971;
begin
select regexp_replace(regexp_replace('000971 05 7910 - 324324','\D'),'^0*(code)?0?') into a from dual;
dbms_output.put_line ( a);
end;but, it does not work ??
Best Regards,
Fateh

venx08 wrote:
You need to bind the code variable value in the regular expression patternYes, that's the idea, but there is a caveat. You might need to escape every regexp special character that appears in code. If, for example code is 'A*B' you need to transform it into 'A\*B' unless you really want 'A*B' to be interpreted as uppercase A repeated zero or more times followed by uppercase B.
SY.

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