ORACLE之檢視資料庫的SQL

polalisi發表於2007-10-12
1、檢視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、檢視錶空間物理檔案的名稱及大小
  select tablespace_name, file_id, file_name,
  round(bytes/(1024*1024),0) total_space from dba_data_files order by tablespace_name;
3、檢視回滾段名稱及大小
  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$rollstat v
  Where r.segment_id = v.usn(+)
  order by segment_name ;
4、檢視控制檔案
  select name from v$controlfile;
5、檢視日誌檔案
  select member from v$logfile;
6、檢視錶空間的使用情況
  select sum(bytes)/(1024*1024) as free_space,tablespace_name
  from dba_free_space group by tablespace_name;
  SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE,(B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE"
  FROM SYS.SM$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、檢視資料庫庫物件
  select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;
8、檢視資料庫的版本 
  Select version FROM Product_component_version
  Where SUBSTR(PRODUCT,1,6)='Oracle';
9、檢視資料庫的建立日期和歸檔方式
  Select Created, Log_Mode, Log_Mode From V$Database;[@more@]

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