oracle查看表空間大小及使用情況

SELECT a.tablespace_name "表空間名",
       total "表空間大小",
       free "表空間剩余大小",
       (total - free) "表空間使用大小",
       total / (1024 * 1024 * 1024) "表空間大小(G)",
       free / (1024 * 1024 * 1024) "表空間剩余大小(G)",
       (total - free) / (1024 * 1024 * 1024) "表空間使用大小(G)",
       round((total - free) / total, 4) * 100 "使用率 %"
  FROM (SELECT tablespace_name, SUM(bytes) free
          FROM dba_free_space
         GROUP BY tablespace_name) a,
       (SELECT tablespace_name, SUM(bytes) total
          FROM dba_data_files
         GROUP BY tablespace_name) b
 WHERE a.tablespace_name = b.tablespace_name

　　備注：用戶需要有dba權限，否則會報表找不到的錯誤。

 

參考：http://blog.itpub.net/31477110/viewspace-2152749/

          https://www.cnblogs.com/lipera/p/6201434.html