SQL Server/T-SQL Tutorial/User Role/CURRENT USER

select CURRENT_USER,

10> SELECT CURRENT_TIMESTAMP, USER, SYSTEM_USER, CURRENT_USER,
11> SESSION_USER
12> GO

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2008-08-17 13:20:57.503 dbo                                                                                                                              J\Administrator
                                                                                  dbo
           dbo
(1 rows affected)