REGEXP_LIKE判断汉字

SELECT *
  FROM DUAL

 WHERE REGEXP_LIKE('了',  '[^[:punct:][:digit:][:upper:][:lower:][:blank:][:cntrl:]]');

SELECT REGEXP_REPLACE('100毫升',
                      '[^[:punct:][:digit:][:upper:][:lower:][:blank:][:cntrl:]]+',
                      '')
  FROM DUAL;