How to change username in oracle

Oracle is one of the largest relational database management system manufacturers in the world and is widely used in enterprise-level database management. The Oracle user name is an important part of the database. It is the account that users need to use to perform various operations on Oracle. Sometimes, due to business needs or personnel adjustments, the Oracle account name needs to be modified. In actual operation, you need to pay attention to some things when modifying the Oracle user name. Let’s learn about them together.

1. Necessary preparations before modifying the Oracle user name

Before modifying the Oracle user name, some preparations need to be made to ensure the success of the operation. The following are the specific steps:

1. Back up data

Before performing important operations, especially before modifying the database, you need to back up the data. Oracle provides a variety of backup methods, such as physical backup, logical backup, etc. You can choose the backup method that suits you for data backup.

2. Check the connection

Before modifying the Oracle user name, you need to check whether the database is running normally and no other users are connected. You can use the sqlplus tool to connect and execute the following command to check:

SQL> select * from v$session;

If there are other user connections in the result, you need to disconnect these connections first, and then Perform operations.

3. Check the consistency of the Oracle user name

Before modifying the Oracle user name, you need to check whether the new user name already exists. If it exists, you need to delete the username first to ensure that no duplication of names occurs.

2. Specific operations to modify the Oracle user name

Now, let’s get to the point and modify the Oracle user name step by step.

1. First, log in to Oracle as the sysdba user and execute the following statement:

SQL> alter session set current_schema = user’s original name;

2. Change the original user name to For the new user name, execute the following statement:

SQL> alter user original user name rename to new user name;

3. Then, switch to the new user name and execute the following statement:

SQL> alter session set current_schema = new username;

Next, change the password and grant permissions to the new username. After completing the above operations, use the new username to perform a login test to ensure that the modification is successful.

3. Issues that need to be paid attention to when modifying the Oracle user name

When modifying the Oracle user name, you also need to pay attention to the following issues:

1. Grant of permissions:

When authorizing a new username, you need to add all permissions of the original username to ensure that no loss of permissions causes business abnormalities.

2. Associations with the original username:

In the code, there may be some associations using the original username, which need to be adjusted to ensure that the code will not be generated due to the modification of the username. abnormal.

3. Logging:

When modifying the user name, the operation and change information need to be recorded to facilitate later tracing and query.

In short, changing the Oracle user name is a relatively complex operation and needs to be carried out with sufficient preparation to ensure the smoothness and safety of the operation. In actual operation, if you have any questions, you can seek professional guidance to avoid mistakes.

The above is the detailed content of How to change username in oracle. For more information, please follow other related articles on the PHP Chinese website!