求用正则表达式解析下面的公式

Question

公式如：A001_01+A002_04/A002_08-(A001_03+A002_06)*(A006_01/(A006_02-A006_03))
解析为：
A001_01,A002_04,A002_08,A001_03,A002_06,A006_01,A006_02,A006_03

Answer 1

select regexp_replace('A001_01+A002_04/A002_08-(A001_03+A002_06)*(A006_01/(A006_02-A006_03))'
       ,'[^[:alnum:]|_]+',',') 
from dual
;
REGEXP_REPLACE('A001_01+A002_04/A002_08-(A001_03+A002_06)*(A006_
----------------------------------------------------------------
A001_01,A002_04,A002_08,A001_03,A002_06,A006_01,A006_02,A006_03,