How to Create a SQL Login and Link It to a Database User

Creating a Login and Mapping It to a user

Write a SQL query to create a login and map it to a database user.

Solution:

-- Create a SQL Server login.
CREATE LOGIN UserF WITH PASSWORD = 'StrongPassword123!';

-- Map the login to a database user.
CREATE USER UserF FOR LOGIN UserF;

Explanation:

• Purpose of the Query :
• The goal is to demonstrate how to create a login and map it to a database user for access control.
• Key Components :
• CREATE LOGIN: Creates a server-level login.
• CREATE USER: Maps the login to a database user.
• PASSWORD: Ensures the login has a strong password.
• Why Create Logins and Users? :
• Logins and users provide granular control over database access.
• They enhance security by separating authentication and authorization.
• Real-World Application :
• In enterprise systems, logins and users ensure secure access to databases.

Additional Notes:

• Use strong passwords and enforce password policies.
• Regularly review logins and users for inactive accounts.
• Important Considerations:
• Avoid using shared logins to ensure accountability.

For more Practice: Solve these Related Problems:

• Write a SQL query to create a login named "AdminUser" with a strong password and map it to a database user with read-only access.
• Write a SQL query to create a login for an external application and map it to a user in the "Sales" database.
• Write a SQL query to create a login for a new employee and map it to a user with permissions restricted to a specific schema.
• Write a SQL query to create a login for a third-party service account and map it to a user with limited access to certain tables.

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• SQL Practical Security and Access Control Exercises Home ↩
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