How to write the right pattern to replace string after a static string?

Question

select regexp_replace('Do not replace CONSTANT "VAR_123" should be replaced ', 'CONSTANT "[A-Z0-9]' ,'CONSTANT "REPLACE') from dual;
Output is:
Do not replace CONSTANT "REPLACEAR_123" should be replaced
Proffered output is :
Do not replace CONSTANT "REPLACE" should be replaced
What is the right pattern to solve my problem?
Help is needed.
Regards

Answer 1

different solutions possible
/* replace everthing in between "" */
select regexp_replace('Do not replace CONSTANT "VAR_123" should be replaced '
                    , '"([A-Z0-9_]*)"' ,'"REPLACE"')
from dual;
Do not replace CONSTANT "REPLACE" should be replaced
/* replace UPPER letters, Numbers and Underscore after keyword CONSTANT an in between "" */
select regexp_replace('Do not replace CONSTANT "VAR_123" should be replaced '
                    , '(CONSTANT) "([A-Z0-9_]*)"' ,'\1 "REPLACE"')
from dual;
Do not replace CONSTANT "REPLACE" should be replaced
/* replace alphanumerica values including underscore after keyword CONSTANT an in between "" */
select regexp_replace('Do not replace CONSTANT "VAR_123" should be replaced '
                    , '(CONSTANT) "([[:alnum:]_]*)"' ,'\1 "REPLACE"')
from dual;One problem was that you did't take into account how the underscore "_" is recognized.