MS SQL Server Interview Question:

How To Change the Name of a Database User?

Submitted by: Administrator

If you want to change the name of an existing database user, you can use the "ALTER USER" statement as shown in the tutorial exercise below:

-- Login with "sa"

USE GlobalGuideLineDatabase;
GO

ALTER USER ggl_User WITH NAME = Dba_User;
GO

-- List all user names
SELECT name, sid, type, type_desc
FROM sys.database_principals WHERE type = 'S';
GO
<pre>name sid type type_desc
-------------------- ------------------------ ---- ---------
dbo 0x01 S SQL_USER
guest 0x00 S SQL_USER
INFORMATION_SCHEMA NULL S SQL_USER
sys NULL S SQL_USER
Dba_User 0x5EB8701EAEBAA74F86F... S SQL_USER</pre>
The of the last user changed from "ggl_User" to "Dba_User".
Submitted by: Administrator