[오라클] 콤마로 분리되는 문자열을 행으로 변환하기

SQL> select regexp_substr('SMITH,ALLEN,WARD,JONES','[^,]+', 1, level) from dual
  2  connect by regexp_substr('SMITH,ALLEN,WARD,JONES', '[^,]+', 1, level) is not null;


REGEXP_SUBSTR('SMITH,A
----------------------
SMITH
ALLEN
WARD
JONES