TAB 공백 제거하기

SELECT REGEXP_REPLACE('변경필드','(^[[:space:]]*|[[:space:]]*$)')

FROM DUAL;

SELECT 'TAB공백제거하기         ' sample_text
  ,regexp_replace('TAB공백제거하기         ','(^[[:space:]]*|[[:space:]]*$)') ch_text
FROM   dual;