How to Create User In Oracle 19C Database?

To create a user in Oracle 19c database, you can use the CREATE USER statement. The basic syntax for creating a user is as follows:

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CREATE USER username IDENTIFIED BY password;

You can also specify additional options while creating a user, such as assigning a default tablespace and quota, granting specific privileges, and setting password policies.

For example, to create a user named "newuser" with a password "password123" and grant the "CONNECT" privilege, you can use the following statement:

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CREATE USER newuser IDENTIFIED BY password123
DEFAULT TABLESPACE users
QUOTA UNLIMITED ON users
GRANT CONNECT TO newuser;

After creating a user, you can then grant additional privileges, roles, and permissions as needed for that user to access and interact with the database objects.

What are the steps for setting up a new user account in Oracle 19c database?

Setting up a new user account in Oracle 19c database involves several steps:

1. Connect to the Oracle database using a privileged account such as SYS or SYSTEM.
2. Create a new user account by running the following SQL command: CREATE USER new_user IDENTIFIED BY password;
3. Grant necessary privileges to the new user account. For example, you can grant the CONNECT and RESOURCE roles to provide basic access to the database: GRANT CONNECT, RESOURCE TO new_user;
4. Optionally, you can grant additional privileges or roles to the new user account based on the specific requirements.
5. Optionally, you can set quotas for the new user account on specific tablespaces to limit the amount of disk space the user can use: ALTER USER new_user QUOTA UNLIMITED ON tablespace_name;
6. Optionally, you can set default tablespaces for the new user account: ALTER USER new_user DEFAULT TABLESPACE tablespace_name;
7. Verify that the new user account has been created successfully by querying the USER$ table: SELECT * FROM dba_users WHERE username = 'new_user';
8. Optionally, you can configure password management policies for the new user account to enforce password complexity and expiration rules: ALTER PROFILE default LIMIT PASSWORD_LIFE_TIME UNLIMITED;

Once you have completed these steps, the new user account should be set up and ready to use in the Oracle 19c database.

How to delete a user in Oracle 19c database?

To delete a user in Oracle 19c database, you can use the following SQL command:

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DROP USER username;

Replace 'username' with the name of the user you want to delete. Make sure you have the necessary privileges to delete a user in the database.

What is the process for deleting a user in Oracle 19c database?

To delete a user in an Oracle 19c database, follow these steps:

1. Connect to the Oracle database using a tool like SQL*Plus or SQL Developer.
2. Connect as a user with the necessary privileges to delete other users (e.g. as SYSDBA).
3. Run the following SQL command to delete the user:

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DROP USER username CASCADE;

Replace username with the name of the user you want to delete. The CASCADE option is used to also drop all objects owned by the user.

1. Confirm the deletion by running the following query:

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SELECT username FROM dba_users WHERE username = 'username';

If the user was successfully deleted, the query should not return any rows.

1. Optionally, you can also revoke any roles and privileges granted to the user before deleting them using the REVOKE command:

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REVOKE role_name FROM username;

Replace role_name with the name of the role you want to revoke from the user.

1. Finally, commit the changes to make them permanent:

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COMMIT;

It is important to note that deleting a user in Oracle is a permanent action and cannot be undone. Make sure to backup any important data before deleting a user.

How can you track user activity in Oracle 19c database?

In Oracle 19c database, user activity can be tracked through various methods such as using auditing, monitoring tools, and querying system views. Here are some ways to track user activity in Oracle 19c database:

1. Database auditing: Oracle provides a built-in auditing feature that allows you to track and log user activity in the database. You can enable auditing at the database, schema, or object level to capture activities such as logins, logouts, DML operations, DDL operations, and more.
2. Unified Auditing: Unified Auditing introduced in Oracle 12c and enhanced in Oracle 19c offers a centralized framework for auditing all user activities in the database. It provides more flexibility and granular control over auditing policies and offers better performance compared to traditional auditing.
3. Fine-grained auditing: Fine-grained auditing allows you to track specific SQL statements executed by users based on predefined audit policies. You can define auditing policies based on SQL predicates, columns, or specific conditions to capture relevant user activities.
4. Database monitoring tools: Oracle Enterprise Manager (OEM) and other third-party monitoring tools can be used to monitor and track user activity in real-time. These tools provide dashboards, reports, and alerts to help administrators monitor database performance, user sessions, and activities.
5. Querying system views: You can query Oracle system views such as V$SESSION, V$SQL, DBA_AUDIT_TRAIL, AUDIT_ACTIONS, and AUDIT_DDL to get information about active user sessions, SQL statements, audit logs, and more. By analyzing these views, you can track and monitor user activity in the database.

By leveraging these methods, database administrators can effectively track, monitor, and audit user activity in Oracle 19c database to ensure security, compliance, and performance of the database environment.