表空間相關Oracle

--1、查看錶空間的名稱及大小 

SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size

  FROM dba_tablespaces t, dba_data_files d

 WHERE t.tablespace_name = d.tablespace_name

 GROUP BY t.tablespace_name;

--2、查看錶空間物理文件的名稱及大小 

SELECT tablespace_name,

       file_id,

       file_name,

       round(bytes / (1024 * 1024), 0) total_space

  FROM dba_data_files

 ORDER BY tablespace_name;

--3、查看回滾段名稱及大小 

SELECT segment_name,

       tablespace_name,

       r.status,

       (initial_extent / 1024) initialextent,

       (next_extent / 1024) nextextent,

       max_extents,

       v.curext curextent

  FROM dba_rollback_segs r, v$rollstat v

 WHERE r.segment_id = v.usn(+)

 ORDER BY segment_name;

--4、查看控制文件 

SELECT NAME FROM v$controlfile;

--5、查看日誌文件 

SELECT MEMBER FROM v$logfile;

--6、查看錶空間的使用情況 

SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name

  FROM dba_free_space

 GROUP BY tablespace_name;

SELECT a.tablespace_name,

       a.bytes total,

       b.bytes used,

       c.bytes free,

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

       (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;

--7、查看數據庫庫對象 

SELECT owner, object_type, status, COUNT(*) count#

  FROM all_objects

 GROUP BY owner, object_type, status;

--8、查看數據庫的版本　 

SELECT version

  FROM product_component_version

 WHERE substr(product, 1, 6) = 'Oracle';

--9、查看數據庫的創建日期和歸檔方式 

SELECT created, log_mode, log_mode FROM v$database;