@@SPID (Transact-SQL)
SQL Server 2012
Returns the session ID of the current user process.
This example returns the session ID, login name, and user name for the current user process.
SELECT @@SPID AS 'ID', SYSTEM_USER AS 'Login Name', USER AS 'User Name';
Here is the result set.
ID Login Name User Name ------ ------------------------------ ------------------------------ 54 SEATTLE\joanna dbo
