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HomeDatabaseMysql Tutorial查看Oracle数据库状态

查看Oracle数据库状态 无 show sgaset wrap offset linesize 400-- 查看正在运行的后台进程select * from v$bgprocess;select * from v$bgprocess where paddr'00';--查看数据库的物理组成:文件情况select * from v$controlfile;select * from v$datafile;se

查看Oracle数据库状态
show sga

set wrap off
set linesize 400
-- 查看正在运行的后台进程
select * from v$bgprocess;
select * from v$bgprocess where paddr<>'00';

--查看数据库的物理组成:文件情况
select * from v$controlfile;
select * from v$datafile;
select * from v$logfile;

--查看实例内存情况
show parameter sga
show parameter shared
show parameter db_cache
show parameter log

alter system set db_cache_size=64m;	//可以动态修改sga中内存区的大小,但是不能超过sga的最大内存

select * from dept;

--表空间管理
CREATE TABLESPACE tbs2
DATAFILE 'D:\oracle\oradata\APTECH\tbs2_01.dbf' 
SIZE 50M;

conn sys/admin as sysdba(重启数据库必须以sys用户登陆)

shutdown immediate(关闭数据库)
启动数据库的三个步骤:
startup nomount	(启动实例)
alter database mount;(装载数据库,读取控制文件)
alter database open;(打开数据库,对数据文件,日志文件进行一致性校验)


--用户管理
-- Create the user 
CREATE USER MARTIN
IDENTIFIED BY martinpwd
DEFAULT TABLESPACE USERS
TEMPORARY TABLESPACE TEMP;

-- Grant role privileges 
GRANT CONNECT TO MARTIN; 
GRANT RESOURCE TO MARTIN;

-- 如果不使用 CONNECT 角色,则需要逐个赋予用户权限
GRANT CREATE SESSION TO MARTIN;

GRANT CREATE TABLE TO MARTIN;

GRANT CREATE VIEW TO MARTIN;

GRANT CREATE SEQUENCE TO MARTIN; 

GRANT CREATE SEQUENCE TO MARTIN; 
GRANT SELECT ON TEST TO MARTIN;
GRANT ALL ON TEST TO MARTIN; 

-- 授予用户使用表空间 USERS 的权限
ALTER USER MARTIN
  QUOTA UNLIMITED ON USERS;
  
 --修改用户密码
ALTER USER MARTIN IDENTIFIED BY martinpass;

--修改自己的密码
在sql*plus中直接输入password命令即可

--删除用户
DROP USER MARTIN CASCADE; 

-- 查看用户 MARTIN 的信息
select USERNAME,USER_ID,DEFAULT_TABLESPACE,TEMPORARY_TABLESPACE
from dba_users
where username = 'MARTIN';
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