--查询表空间使用情况
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)",
       D.AUTOEXTENSIBLE                 "是否自增长",
       D.INCREMENTSIZE                  "自增长大小(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,
               AUTOEXTENSIBLE,
               --INCREMENT_BY的单位是数据块的大小。数据块大小一般为默认8k
               Round(INCREMENT_BY * (select value/1024 from v$parameter where name='db_block_size')/1024, 2) INCREMENTSIZE
        FROM   SYS.DBA_DATA_FILES DD
        GROUP  BY DD.TABLESPACE_NAME,AUTOEXTENSIBLE,INCREMENT_BY) D
WHERE  D.TABLESPACE_NAME = F.TABLESPACE_NAME
ORDER  BY  "表空间名"

显示结果如下：

参考：https://www.cnblogs.com/xwdreamer/p/3511047.html

自己进行了一