SELECT
  B.TABLESPACE_NAME bkj,
  SUBSTR((B.BYTES-SUM(NVL(A.BYTES,0)))/(B.BYTES)*100,1,5) syl
FROM DBA_FREE_SPACE A,DBA_DATA_FILES B
WHERE A.FILE_ID=B.FILE_ID
GROUP BY B.TABLESPACE_NAME,B.FILE_NAME,B.BYTES
ORDER BY B.TABLESPACE_NAME;