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QOD 7/29/2003

  • July 29, 2003 at 1:20 am

    #106272

    Hi there,

    I guess it was too early to answer today's QOD

    I choose USER instead of SYSTEM_USER.

    From BOL

    SYSTEM_USER

    Allows a system-supplied value for the current system username to be inserted into a table when no default value is specified.

    USER

    Allows a system-supplied value for the current user's database username to be inserted into a table when no default value is specified.

    Is this the only difference?

    Cheers,

    Frank

    In the subject you can see, that it's still too early

    Edited by - a5xo3z1 on 07/29/2003 01:21:58 AM

    --
    Frank Kalis
    Microsoft SQL Server MVP
    Webmaster: http://www.insidesql.org/blogs
    My blog: http://www.insidesql.org/blogs/frankkalis/[/url]

  • July 29, 2003 at 2:01 am

    #467410

    One would expect a more reponsible approach to QOD from you Frank.

    As an experienced DBA you must try to follow standard procedure in your morning activities:

    1. coffee

    2. another coffee

    3. QOD

    Here Down Under we don't see QOD until the afternoon, so I guess I'm all caffeined up and at a distinct advantage.

    Cheers,

    - Mark


    Cheers,
    - Mark

  • July 29, 2003 at 2:05 am

    #467411

    quote:

    One would expect a more reponsible approach to QOD from you Frank.

    As an experienced DBA you must try to follow standard procedure in your morning activities:

    1. coffee

    2. another coffee

    3. QOD

    1. coffee ok ...

    2. another coffee missed this one. Sh*t

    3. QOD I'm a loser, baby

    Cheers,

    Frank

    --
    Frank Kalis
    Microsoft SQL Server MVP
    Webmaster: http://www.insidesql.org/blogs
    My blog: http://www.insidesql.org/blogs/frankkalis/[/url]

  • July 29, 2003 at 5:11 am

    #467433

    If you sign in through QA and try both, you'll see the difference even though BOL is not very clear. If you signin with bknight into your server, and use SYSTEM_USER, it will say bknight. USER will say dbo.

    Brian Knight

    bknight@sqlservercentral.com

    http://qa.sqlservercentral.com/columnists/bknight

    Brian Knight
    Free SQL Server Training Webinars

  • July 29, 2003 at 6:27 am

    #467452

    Hi Brian,

    quote:

    If you sign in through QA and try both, you'll see the difference even though BOL is not very clear. If you signin with bknight into your server, and use SYSTEM_USER, it will say bknight. USER will say dbo.

    it was definitely too early.

    Cheers,

    Frank

    --
    Frank Kalis
    Microsoft SQL Server MVP
    Webmaster: http://www.insidesql.org/blogs
    My blog: http://www.insidesql.org/blogs/frankkalis/[/url]

  • July 29, 2003 at 8:00 am

    #467492

    Why not session_user ?

  • July 29, 2003 at 9:19 am

    #467518

    quote:

    Why not session_user ?

    Because session_user returns the database user name, not the login name.

  • July 29, 2003 at 11:11 am

    #467538

    May I know the difference between database user name and log in name? I know the log in name is "sa" or "bknight", but who is "dbo"? Is it something like a user group?

    Thanks,

    Karen.

  • July 29, 2003 at 11:31 am

    #467545

    dbo is DataBase Owner. Anyone can be assigned the dbo privilege/permission.

    Use Enterprise Manager, drill down to Security. Expand that and select Logins. Right click on a login and select Properties. Go to the Database Access tab and select a database. Look at the list of Roles for the database. You will see db_owner. That's DBO.

    -SQLBill

  • July 29, 2003 at 3:18 pm

    #467611

    Ok, I missed this one too because it was too early and I was in a rush. I'm wondering, though, what's the difference between SYSTEM_USER and SUSER_SNAME()?

    Jason

  • July 29, 2003 at 3:32 pm

    #467615

    I don't think there's any difference. SUSER_SNAME() can be used instead. However, SYSTEM_USER is the more accepted, and might even be something that will work across other database systems.

    I think SYSTEM_USER will give consistent results across all SQL versions too.

    Cheers,

    - Mark


    Cheers,
    - Mark

  • July 30, 2003 at 7:56 am

    #467738

    I have used both User_name() and also System_User in different instances. Both functions return the same results for a SQL user account as long as it is mapped same. However, for NT accounts the results may be different. For example an NT account with Sysadmin prevs and also assigned to db_owner database role, the system_user returns NT login (Domain\User) but user_name or user() returns dbo. By definition,

    USER_NAME :Returns a user database username from a given identification number.

    SYSTEM_USER: Allows a system-supplied value for the current system username to be inserted into a table when no default value is specified

    Well the choice of function depends on what one is trying to achieve ? read a login or database user name.

    Have a good one

    -Sravan

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