Adds a database user, database role, Windows login, or Windows group to a database role in the current database.
A member added to a role by using sp_addrolemember inherits the permissions of the role. If the new member is a Windows-level principal without a corresponding database user, a database user will be created but may not be fully mapped to the login. Always check that the login exists and has access to the database.
A role cannot include itself as a member. Such "circular" definitions are not valid, even when membership is only indirectly implied by one or more intermediate memberships.
sp_addrolemember cannot add a fixed database role, fixed server role, or dbo to a role. sp_addrolemember cannot be executed within a user-defined transaction.
Only use sp_addrolemember to add a member to a database role. To add a member to a server role, use sp_addsrvrolemember (Transact-SQL).
Adding members to flexible database roles requires one of the following:
Membership in the db_owner fixed database role.
Membership in the db_securityadmin fixed database role.
Membership in the role that owns the role.
ALTER permission on the role.
Adding members to fixed database roles requires membership in the db_owner fixed database role.
A. Adding a Windows login
The following example adds the Windows login Contoso\Mary5 to the AdventureWorks database as user Mary5. The user Mary5 is then added to the Production role.
Because Contoso\Mary5 is known as the database user Mary5 in the AdventureWorks database, the user name Mary5 must be specified. The statement will fail unless a Contoso\Mary5 login exists. Test by using a login from your domain.
USE AdventureWorks GO CREATE USER Mary5 FOR LOGIN [Contoso\Mary5] ; GO EXEC sp_addrolemember 'Production', 'Mary5'
B. Adding a database user
The following example adds the database user Mary5 to the Production database role in the current database.
EXEC sp_addrolemember 'Production', 'Mary5'