테이블 이름 칼럼 트리형식으로 가져오기

 SELECT DECODE(RN,1,TABLE_NAME),TABLE_NAME,COLUMN_NAME,COMMENTS
 FROM (
  SELECT USER_COL_COMMENTS.* , ROW_NUMBER() OVER(PARTITION BY TABLE_NAME ORDER BY ROWNUM ) rn 
  FROM USER_COL_COMMENTS
  WHERE TABLE_NAME LIKE 'TABLE_%';
  )