User and Privilege Manage

本文详细介绍了如何使用系统管理员身份创建数据库用户,并通过命令行赋予用户必要的权限,包括创建会话、创建表、连接资源等操作。同时,还讲解了用户管理、权限回收以及密码更改等关键步骤。

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Create a User

You must use manager(Such as "sys" or "system") to login who has the power to create and manage database users.

COMMAND:

create user username IDENTIFIED BY password;

As new user is just created and now any privileges, it will say the new user cann't create SESSION when you  try to login by the new user through sqlplus .

So we need to give the new user privileges.


Grant Privilege

1.GRANT CREATE SESSION TO newuser;

2.GRANT CREATE TABLE TO newuser;

3.GRANT CONNECT,RESOURCE TO newuser;

4.GRANT SELECT ON scotter.emp TO newuser;


User Manage

1.ALTER USER newuser IDENTIFIED BY newpwd;

2.ALTER USER newuser PASSWORD EXPIRE; This will force the newuser to give a new password when he first logs in.

3.ALTER USER newuser ACCOUNT LOCK;

4.ALTER USER newuser ACCOUNT UNLOCK;


REVOKE Privileges

1.REVOKE SELECT ON scotter.emp form newuser;

2.REVOKE CONNECT,RESOURCE,CREATE TABLE,CREATE SESSION from newuser;

3.DROP USER newuser CASCADE;


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