1）查看表空间物理文件的名称及大小 

SELECT tablespace_name, 

file_id, 

file_name, 

round(bytes/(1024*1024*1024), 2)||' GB' total_space 

FROM dba_data_files 

ORDER BY tablespace_name;

2）查看表空间的使用情况 

SELECT round(SUM(bytes)/(1024*1024*1024),2)||' GB' AS free_space, tablespace_name 

FROM dba_free_space 

GROUP BY tablespace_name; 

3）查看表空间的使用情况 

SELECT a.tablespace_name, 

round(a.bytes/(1024*1024*1024),2)||' GB' total, 

round(b.bytes/(1024*1024*1024),2)||' GB' used, 

round(c.bytes/(1024*1024*1024),2)||' GB' free, 

round((b.bytes * 100) / a.bytes)||'%' "% USED ", 

round((c.bytes * 100) / a.bytes)||'%' "% FREE " 

FROM sys.sm$ts_avail a, sys.sm$ts_used b, sys.sm$ts_free c 

WHERE a.tablespace_name = b.tablespace_name 

AND a.tablespace_name = c.tablespace_name;