What is role and user in SQL Server?

What is the difference between role and user in SQL?

A role is a privelege group, whereas a User is a person or Active Directory group. For example, an AD group "IT_Developers" may have Writer access to a database, but the AD group "Domain Administrators" aren't neccessarily admins on the database.

What are server roles and DB roles?

Server roles are maintained by the database administrator (DBA) and apply to the entire server, not an individual database file. The public role sets the basic default permissions for all users. Every user that's added to SQL Server is automatically assigned to the public role—you don't need to do anything.

What is the role of user in database?

Definition of user-defined user roles A role is a database object that groups together one or more privileges and can be assigned to users. A user that is assigned a role receives all of the privileges of that role. A user can have multiple roles. A role hierarchy is also supported.

How will you assign a role to user in SQL Server?

Right-click the role you want to edit and select Properties. In the Database Role Properties -database_role_name dialog box, in the General page, click Add. In the Select Database User or Role dialog box, under Enter the object names to select (examples), enter the login or database role to add to this database role.