SELECT UPPER(F.TABLESPACE_NAME) "表空间名",
       　　D.TOT_GROOTTE_MB "表空间大小(M)",
       　　D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",
       　　TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) /
                       D.TOT_GROOTTE_MB * 100,
                       2),
                 990.99) || '%' "使用比",
       　　F.TOTAL_BYTES "空闲空间(M)",
       　　F.MAX_BYTES "最大块(M)" 　　FROM (SELECT TABLESPACE_NAME,
                                             　　ROUND(SUM(BYTES) /
                                                     (1024 * 1024),
                                                     2) TOTAL_BYTES,
                                             　　ROUND(MAX(BYTES) /
                                                     (1024 * 1024),
                                                     2) MAX_BYTES 　　FROM SYS.DBA_FREE_SPACE 　　GROUP BY TABLESPACE_NAME) F,
       　　 (SELECT DD.TABLESPACE_NAME,
                  　　 ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB 　　FROM SYS.DBA_DATA_FILES DD 　　GROUP BY DD.TABLESPACE_NAME) D 　　WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME 　　ORDER BY 1