Issue when executing select user_name() function


  I have an issue when executing select user_name() function from SQL SERVER.  

     select user_name()

  In some instances it returns dbo and in others instances it returns the user that is connected.    

  Is there a reason for this ? ,

 Am i missing some settings ?

 This has to be because of the SQL Version ? SQL Express ?

 Thanks for the help.


   Joe Echavarria.
joe_echavarriaDatabase AdministratorAsked:
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Vitor MontalvãoMSSQL Senior EngineerCommented:
user_name() returns the database user name and not the SQL Server login name, meaning that don't expect both to be the same even that's true in majority of the cases.
dbo is the user name that's owner of the database.
You might want the value returned from:

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Scott PletcherSenior DBACommented:
Also look at:

HOST_NAME () --for the user's machine name, in some cases can identity the user
joe_echavarriaDatabase AdministratorAuthor Commented:
I want the SQL Server Login name.

What would be the function for that ?
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joe_echavarriaDatabase AdministratorAuthor Commented:
Is there any limitation for those functions to work if it is SQL EXPress ?
Brendt HessSenior DBACommented:
If a user is logged in as part of a group's permissions, you may want to use SUSER_SNAME instead of SUSER_NAME. SUSER_NAME only returns the user name if that user has a login recorded in server_principals.
Vitor MontalvãoMSSQL Senior EngineerCommented:
Did you try my suggestion?

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