SQL Server Create Login: A Comprehensive Guide for Devs

Welcome, Devs! In this article, we will discuss everything you need to know about creating a login in SQL Server. A login is a security principal that allows you to connect to a SQL Server instance and access its resources. Whether you are a beginner or an experienced SQL Server user, this guide will help you create logins with ease. Let’s dive in!

Understanding SQL Server Logins

Before we proceed to the actual steps of creating a login, let’s first understand the different types of logins in SQL Server.

Windows Logins

A Windows login is a login that is based on a Windows user account. When you create a Windows login, you are granting access to SQL Server to a specific Windows user account. This user account must already exist in the Windows operating system.

SQL Server Logins

A SQL Server login is a login that is stored in SQL Server. Unlike Windows logins, SQL Server logins are not linked to a Windows user account. Instead, they have their own username and password.

Server Roles

Server roles are a set of predefined roles that are used to manage server-level permissions in SQL Server. When you create a login, you can assign it to one or more server roles to grant it certain permissions.

Database Roles

Database roles are similar to server roles, but they are used to manage database-level permissions. When you create a login, you can assign it to one or more database roles to grant it certain permissions within a specific database.

Creating a SQL Server Login

Now that we have a basic understanding of SQL Server logins, let’s proceed to the steps involved in creating a login.

Step 1: Connect to SQL Server

The first step in creating a login is to connect to SQL Server. You can do this using SQL Server Management Studio (SSMS) or any other SQL Server client.

Step 2: Open the Security Folder

Once you have connected to SQL Server, expand the server instance in Object Explorer and navigate to the Security folder.

Step 3: Right-Click Logins and Select New Login

Right-click on the Logins folder and select New Login. This will open the New Login window.

Step 4: Specify the Login Name

In the New Login window, specify the name of the login in the Login name field. This can be a Windows login or a SQL Server login.

Step 5: Select the Authentication Mode

Next, select the authentication mode for the login. You can choose between Windows authentication and SQL Server authentication.

Step 6: Specify the Password

If you are creating a SQL Server login, you will need to specify a password for the login in the Password field. Make sure to choose a strong password and keep it secure.

Step 7: Select the Default Database

Select the default database for the login. This is the database that the login will use by default when it connects to SQL Server.

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Step 8: Specify the Server Roles

If you want to grant the login server-level permissions, select the server roles that you want to assign to the login. You can select one or more server roles from the list.

Step 9: Specify the User Mapping

If you want to grant the login database-level permissions, select the user mappings that you want to assign to the login. You can select one or more databases and their associated database roles from the list.

Step 10: Click OK

Once you have specified all the necessary details for the login, click OK to create it. You should see the new login in the Logins folder in Object Explorer.

FAQs

#
Question
Answer
1
Can I use a Windows group as a login?
Yes, you can create a Windows group and use it as a login in SQL Server.
2
What is the maximum length of a login name?
The maximum length of a login name is 128 characters.
3
Can I create a login using T-SQL?
Yes, you can use the CREATE LOGIN statement to create a login in SQL Server.
4
Can I change the password of a SQL Server login?
Yes, you can change the password of a SQL Server login using the ALTER LOGIN statement.
5
What happens if I delete a login?
If you delete a login, all the associated server-level and database-level permissions will also be deleted.

Conclusion

Creating a login in SQL Server is a fundamental task that every DBA or developer should know. By following the steps outlined in this article, you can create logins with ease and grant them the necessary permissions to access SQL Server resources. We hope you found this guide useful. Happy coding!