How to modify the system account in the Oracle database management system

Oracle database is a highly recognized relational database management system in the industry and is widely used in all walks of life, especially in large enterprise-level applications. The Oracle system has various roles, one of the most important system accounts is "system". The System account has full access to the entire database system, so it needs to be treated with great care. In this article, we will discuss how to modify the system account in the Oracle database management system.

First, we need to log in to the database management system in order to make the necessary modifications. After logging in, we need to execute the following command in SQL Plus:

ALTER USER system IDENTIFIED BY new password;

The above command will change the password of the system account to the new password. It is important to note that the new password should be complex and secure enough to avoid any unauthorized access. Passwords should include uppercase and lowercase letters, numbers, and special characters, and should not be the same as passwords used for other accounts. In addition, to improve security, we can also set a password expiration time to ensure that passwords are changed regularly.

In addition to changing the password of the system account, we can also protect the security of the database by controlling user permissions. Oracle provides the following permissions:

• CONNECT permission: This permission allows users to connect to the database.
• RESOURCE permission: This permission allows users to use database schemas and objects.
• DBA permissions: This permission allows users to perform any operations in the database.

To ensure the security of the database, we recommend limiting users' permissions as much as possible and granting them only the minimum permissions they need. For example, we can limit the permissions of the system account to RESOURCE, which will ensure that the system account has the necessary system management permissions and will not allow him to perform any operations.

Before making any modifications, we should also back up the system to avoid any possible data loss. Oracle provides a variety of backup options, including full backup, incremental backup and archive backup. We should choose the appropriate backup option based on the actual situation to ensure that we can easily restore the data if any problem occurs.

In general, the security of the Oracle database system is very important, so we need to treat system accounts and other sensitive information very carefully. Before modifying the system account, we should ensure that all data is backed up and the most appropriate backup option is selected. We should also limit user permissions to ensure database security. Through these operations, we can ensure that our database system operates securely and that our sensitive data is protected.

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