Oracle查询表空间使用大小，使用率，剩余大小，百分比

SELECT D.TABLESPACE_NAME,SPACE,BLOCKS SUM_BLOCKS,SPACE-NVL(FREE_SPACE,0), ROUND((1-NVL(FREE_SPACE,0)/SPACE)*100,2),FREE_SPACE FROM (SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) SPACE,SUM(BLOCKS) BLOCKS FROM DBA_DATA_FILES GROUP BY TABLESPACE_NAME) D, (SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) FREE_SPACE FROM DBA_FREE_SPACE GROUP BY TABLESPACE_NAME) F WHERE  D.TABLESPACE_NAME = F.TABLESPACE_NAME(+) and D.TABLESPACE_NAME IN('SYSTEM');