How do I create a login domain user in SQL Server?

You can create a login domain user in SQL Server by using SQL Server Management Studio (SSMS). Here's how:

1. Connect to your SQL Server instance.
2. Expand Security -> Logins.
3. Right-click and select "New Login".
4. In the "Login - New" dialog box, enter the domain user's name in the format "domain\username".
5. Select the "Windows Authentication" option.
6. Click "OK" to create the login.

You can also use Transact-SQL (T-SQL) to create a login domain user:

CREATE LOGIN [domain\username] FROM WINDOWS;

Practical Insights:

• Server Roles: You can assign server roles to the login, such as sysadmin, to grant specific privileges to the user.
• Database Roles: You can also assign database roles, such as db_owner, within specific databases to control the user's access to database objects.
• User Mappings: You need to map the login to a database user for the user to access database objects.

Example:

To create a login for the domain user john.doe from the example.com domain and grant them sysadmin privileges, you would follow these steps:

1. Connect to your SQL Server instance.
2. Expand Security -> Logins.
3. Right-click and select "New Login".
4. In the "Login - New" dialog box, enter "example.com\john.doe" in the "Login name" field.
5. Select the "Windows Authentication" option.
6. Select the sysadmin role under "Server Roles".
7. Click "OK" to create the login.