티스토리 뷰

SELECT *
  FROM (SELECT   segment_name, owner,
                 ROUND ((BYTES / 1024 / 1024 / 1024), 4) || 'GB' BYTE
            FROM dba_segments
           WHERE owner IN ('USER_NAME') AND segment_type = 'TABLE'
        ORDER BY BYTE DESC)
 WHERE ROWNUM < 20