以下的文章內容主要是對Oracle維護常用到的SQL語句的介紹,如果你也是計算機一族的話,相信在 浏覽完這篇文章你會對相關的SQL語句有一個更好的了解,以下就是文章的具體內容的描述。
1、查看表空間的名稱及大小
- 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、查看表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、Oracle維護常用SQL語句中我們需要查看日志文件
- select member from v$logfile;
6、查看表空間的使用情況
- select sum(bytes)/(1024*1024) as free_space,tablespace_name
- from dba_free_space
- group by tablespace_name;
- SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE,
- (B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE"
- FROM SYS.SM$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$Database;
10、捕捉運行很久的SQL
- column username format a12
- column opname format a16
- column progress format a8
- select username,sid,opname,
- round(sofar*100 / totalwork,0) ''%'' as progress,
- time_remaining,sql_text
- from v$session_longops , v$sql
- where time_remaining <> 0
- and sql_address = address
- and sql_hash_value = hash_value
- /