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Linux环境Oracle常用命令

Jun 07, 2016 pm 04:00 PM
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Linux环境Oracle常用命令 1、启动oracle数据库: //切换至Oracle用户: [root@server36 ~]# su - oracle //进入sqlplus环境,nolo

Linux环境Oracle常用命令

1、启动oracle数据库:

//切换至Oracle用户:

[root@server36 ~]# su - oracle

//进入sqlplus环境,nolog参数表示不登录:

[oracle@server36 ~]$ sqlplus /nolog

//以管理员模式登录:

[oracle@server36 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Fri Apr 17 10:13:07 2015

Copyright (c) 1982, 2011, Oracle. All rights reserved.

Connected.

//启动数据库

SQL> startup

//停止数据库

SQL> shutdown immediate

2、数据库监听:

//启动监听服务

[root@server36 ~]# su - oracle

[oracle@server36 ~]$ lsnrctl start

//停止监听服务

[oracle@server36 ~]$ lsnrctl stop

 

//查看监听状态

 [oracle@server36 ~]$ lsnrctl status

 

3、用户权限管理:

注:以下命令都需要DBA权限。
//创建用户
create user ittbank identified by 123456 ;
//赋予用户的表空间权限
alter user ittbank default tablespace ittbank;;
//或者两条命令合并为
create user ittbank identified by 123456 default tablespace ittbank;

(注:新创建的用户是没有任何权限的,登录的权限都没有。因此需要再继续做授权操作,但必须是具有授权能力的用户,例如:sys、system;角色是指由系统权限集合,,通常给某个用户授权时,如果没有角色存在的话,则需要一条条的操作。通常一个角色由多个系统权限组成。常用的角色有三个connect(7种权限),dba,resource(在任何表空间建表))。

//授予用户管理权限

grant connect,resource,dba to ittbank ;

//删除用户

drop user“name”cascade;

(注:cascade参数是级联删除该用户所有对象,经常遇到如用户有对象而未加此参数则用户删不了的问题,所以习惯性的加此参数。“name”的引号有无都是一样的。)

4、数据表及表空间:

//创建表空间

create tablespace ittbank datafile '/u01/app/oracle/oradata/ORCL/ittbank.dbf' size 300m autoextend on;

注:说明:末尾带autoextend on参数表示当表空间大小不够用时会自动扩容,所有建议加上autoextend on参数。

//查询当前表空间

select * from v$tablespace;

//查询所有表空间

select * from sys.dba_tablespaces; --查询表空间

//查看用户当前连接数

select count(*) from sys.v_$session;

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