Oracle常用命令与查询

1、查询系统中所有对表的锁

select p.spid,
       a.serial#,
       c.object_name,
       b.session_id,
       b.oracle_username,
       b.os_user_name
  from v$process p, v$session a, v$locked_object b, all_objects c
 where p.addr = a.paddr
   and a.process = b.process
   and c.object_id = b.object_id

 

2、查看连接的进程

SELECT sid, serial#, username, osuser FROM v$session;

 

3、杀掉进程

alter system kill session 'sid,serial#';

 

4、查看当前用户下表的占用空间

Select Segment_Name, Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name

 

5、查询所有对象占用空间

select owner, segment_name,sum(bytes/1024/1024)   from   dba_segments   
group by owner,segment_name

 

6、查询数据库中各对象占用空间大小

Select Segment_Name,b.object_type, Sum(bytes)/1024/1024 From User_Extents a,user_objects b
where a.segment_name=b.object_name Group By Segment_Name,b.object_type order by object_type, Segment_Name

 

7、oracle中去除字段中的回车符

update ywj_yxglobj set table_name = replace(table_name,chr(10),'')
where table_name like 'ACCT_INFO%'