Oracle 常用命令

1.查看全局数据库名

   select name from v$database;

2.查看用户

   select username,password from dba_users;

3.修改密码，将用户system密码修改为 manager

   alter user system identified by manager;

4.查看权限

   SELECT * FROM ROLE_SYS_PRIVS WHERE ROLE = 'RESOURCE';

   select privilege from dba_sys_privs where grantee like 'RESOURCE';

5.授予权限

  grant CREATE VIEW to RESOURCE;

6.查看server字符集

    select userenv('language') from dual;

7.修改字符集

   

 关闭数据库

SQL>SHUTDOWN IMMEDIATE

 

2. 启动到Mount

SQL>STARTUP MOUNT;

SQL>ALTER SYSTEM ENABLE RESTRICTED SESSION;

SQL>ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;

SQL>ALTER SYSTEM SET AQ_TM_PROCESSES=0;

SQL>ALTER DATABASE OPEN;

--这里可以从父集到子集

SQL>ALTER DATABASE CHARACTER SET ZHS16GBK;

SQL>ALTER DATABASE NATIONAL CHARACTER SET AL16UTF16;

--如果是从子集到父集，需要使用INTERNAL_USE 参数，跳过超子集检测

SQL>ALTER DATABASE CHARACTER SET INTERNAL_USE AL32UTF8;

SQL>ALTER DATABASE NATIONAL CHARACTER SET INTERNAL_USE AL16UTF16;

 

SQL>SHUTDOWN IMMEDIATE;

SQL>STARTUP