SUSER_SID
Returns the security identification number (SID) for the user's login name.
Syntax
SUSER_SID ( [ 'login' ] )
Arguments
'login'
Is the user's login name. login is sysname. login, which is optional, can be a Microsoft® SQL Server™ login or Microsoft Windows NT® user or group. If login is not specified, information about the current user is returned.
Return Types
varbinary(85)
Remarks
When specifying a SQL Server login using SQL Server Authentication, the user must be granted permission to connect to SQL Server. Use sp_addlogin or SQL Server Enterprise Manager to grant this permission. However, when specifying a Windows NT user or group using Windows Authentication, this user or group does not have to be granted permission to connect to SQL Server.
SUSER_SID can be used as a DEFAULT constraint in either ALTER TABLE or CREATE TABLE.
System functions can be used in the select list, in the WHERE clause, and anywhere an expression is allowed, and must always be followed by parentheses (even if no parameter is specified).
Examples
A. Use SUSER_SID
This example returns the security identification number for the SQL Server sa login.
SELECT SUSER_SID('sa')B. Use SUSER_SID with a Windows NT username
This example returns the security identification number for the Windows NT user London\Workstation1.
SELECT SUSER_SID('London\Workstation1')C. Use SUSER_SID as a DEFAULT constraint
This example uses SUSER_SID as a DEFAULT constraint in a CREATE TABLE statement.
USE pubs
GO
CREATE TABLE sid_example
(
login_sid varbinary(85) DEFAULT SUSER_SID(),
login_name varchar(30) DEFAULT SYSTEM_USER,
login_dept varchar(10) DEFAULT 'SALES',
login_date datetime DEFAULT GETDATE()
)
GO
INSERT sid_example DEFAULT VALUES
GO