How to Create A User In Oracle 12C?

To create a user in Oracle 12c, you first need to connect to the Oracle database as a user with administrative privileges, such as the SYS or SYSTEM user. Once connected, you can use the CREATE USER statement to create a new user.

The basic syntax for creating a user in Oracle 12c is:

CREATE USER username IDENTIFIED BY password;

You can also assign various privileges to the user, such as granting them the ability to connect to the database, creating tables, or accessing specific objects.

After creating the user, you may also need to grant the necessary permissions and roles to the user to allow them to perform various tasks within the database.

It is important to follow best practices when creating users in Oracle 12c, such as using strong passwords and limiting the privileges granted to each user to ensure the security and integrity of the database.

How to grant access to specific objects to a new user in Oracle 12c?

To grant access to specific objects to a new user in Oracle 12c, you can follow these steps:

1. Log in to Oracle Database as a user with administrative privileges (such as SYS or SYSTEM).
2. Create the new user by running the following SQL command: CREATE USER new_user IDENTIFIED BY password;
3. Grant necessary privileges to the new user to access specific objects. For example, if you want to grant SELECT privilege on a table named "example_table" to the new user, you can run the following SQL command: GRANT SELECT ON example_table TO new_user;
4. Optionally, you can grant additional privileges to the new user, such as INSERT, UPDATE, DELETE, or other necessary privileges.
5. Verify the privileges granted to the new user by running the following SQL command: SELECT * FROM USER_TAB_PRIVS WHERE GRANTEE = 'new_user';
6. Optionally, you can also grant roles to the new user for more granular access control.
7. The new user should now have access to the specific objects that you granted privileges for.

Remember to properly manage and monitor the privileges granted to users to ensure the security and integrity of the Oracle database.

What is the difference between creating a user and creating a login in Oracle 12c?

In Oracle 12c, creating a user and creating a login are different actions with different purposes.

• Creating a user: When you create a user in Oracle 12c, you are creating a database user account, which allows a specific user to access and manipulate the database. A user in Oracle 12c is associated with a specific schema in the database and has its own set of privileges and roles that determine what actions they can perform.
• Creating a login: Creating a login in Oracle 12c involves creating a connection to the database for a specific user. A login is typically associated with a specific authentication method, such as a username and password or an external authentication method. Creating a login allows a user to connect to the database and access the objects and data within it.

In summary, creating a user in Oracle 12c involves creating a database user account with its own set of privileges, while creating a login involves creating a connection to the database for a specific user.

What is the significance of the CONNECT and RESOURCE roles when creating a user in Oracle 12c?

In Oracle 12c, the CONNECT role allows a user to establish a connection to the database and access their own schema objects. This role enables a user to log in to the database and perform basic operations such as querying tables, inserting data, updating records, and deleting information.

The RESOURCE role, on the other hand, grants a user the ability to create and manage their own schema objects such as tables, views, indexes, sequences, and procedures. This role provides the user with the necessary privileges to create, update, and delete objects within their own schema.

By assigning these roles to a user when creating their account, the user is granted specific permissions and capabilities within the database. The CONNECT role allows the user to log in and perform basic operations, while the RESOURCE role enables the user to create and manage their own objects within their schema.