Oracle管理常用查詢語句

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、查看復原段名稱及大小

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、查看控制檔案

select name from v$controlfile;

5、查看記錄檔

select member from v$logfile;

6、查看錶空間的使用方式

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、查看資料庫庫對象

select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;

8、查看資料庫的版本　

Select version FROM Product_component_version
Where SUBSTR(PRODUCT,1,6)='Oracle';

或者： 

9、查看資料庫的建立日期和歸檔方式

Select Created, Log_Mode, Log_Mode From V$Database;

10、查看資料庫SID

  Select name from v$database;

11、  查看Oracle執行個體監聽連接埠

只需要查看監聽設定檔listener.ora檔案即可，如果需要更改這個連接埠，只需修改該檔案然後重啟執行個體

12、 (待更新....)

Select banner from sys.v_$version;