一、查看表空间

SELECT a.tablespace_name tbsname,trunc(a.total,2) space_allocated,
       trunc((a.total-nvl(b.free,0.0)),2)space_used,
       trunc((a.total-NVL(b.free,0.0))/a.max * 1000) / 10 USED__PRC,
	   trunc(a.max,2) space_max
FROM (SELECT tablespace_name,sum(bytes)/1024/1024/1024 total,sum(maxbytes)/1024/1024/1024 max
      FROM (SELECT tablespace_name,bytes,decode(maxbytes,0,bytes,maxbytes)maxbytes FROM dba_data_files)
      GROUP BY tablespace_name) A,
     (SELECT tablespace_name,sum(bytes)/1024/1024/1024 free
      FROM dba_free_space
      GROUP BY tablespace_name) B
WHERE a.tablespace_name=b.tablespace_name
order by 4;

　　二、查看单个表空间

select file_name,bytes/1024/1024/1024 from dba_data_files where  tablespace_name='PCM_OC';
select file_name,bytes/1024/1024/1024 from dba_data_files where FILE_NAME like '%shfw%';

　　三、添加或resize数据文件

alter database datafile '/路径/数据文件' resize 30G;
alter tablespace TBS_YUTONG_SHPJ add datafile '/路径/数据文件f' size 30G;