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Steve Jones - SSC Editor

Posted Monday, January 05, 2009 11:58 PM

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Comments posted to this topic are about the item Security

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Post #630334

free_mascot

Posted Tuesday, January 06, 2009 12:39 AM

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I guess; "A user to act like another user"

looks correct answer as per the following MS article:

http://msdn.microsoft.com/en-us/library/ms188304.aspx

---------------------------------------------------
"Thare are only 10 types of people in the world:
Those who understand binary, and those who don't."

Post #630349

ChiragNS

Posted Tuesday, January 06, 2009 1:01 AM

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According to BOL the answer seems to be the first option.

"Keep Trying"

Post #630358

Hugo Kornelis

Posted Tuesday, January 06, 2009 4:38 AM

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Hi Steve,

Impersonation is a generic term for using the security settings of a user that you are not authenticated as. This term is used *both* for

(a) database users impersonating other database users (using the EXECUTE AS command, or executing stored procedures with the EXECUTE AS clause), which requires the aptly named IMPERSONATE permission - see also the link free_mascot posted; and

(b) the SQL Server service connecting to another instance under the context of an authenticated Windows user.

So both the first and the third answer are correct.

Hugo Kornelis, SQL Server MVP
Visit my SQL Server blog: http://sqlblog.com/blogs/hugo_kornelis

Post #630439

Ralf Dietrich

Posted Tuesday, January 06, 2009 6:31 AM

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Hi Steve,

next time I suggest to have check boxes instead of radio boxes.
You show us two correct answers!

Ralf

I feel sorry with all of us - whom was using the first correct answer

Post #630502

dgabele

Posted Tuesday, January 06, 2009 7:07 AM

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Could someone explain why the first answer would be incorrect?

I felt it was a correct answer based on SQL 2005 BOL:

ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.en/udb9/html/6d156257-8c80-4062-a6a0-acc6797b293f.htm

SQL Server 2005 supports the ability to impersonate another principal either explicitly by using the stand-alone EXECUTE AS statement, or implicitly by using the EXECUTE AS clause on modules. The stand-alone EXECUTE AS statement can be used to impersonate server-level principals, or logins, by using the EXECUTE AS LOGIN statement. The stand-alone EXECUTE AS statement can also be used to impersonate database level principals, or users, by using the EXECUTE AS USER statement.

Implicit impersonations that are performed through the EXECUTE AS clause on modules impersonate the specified user or login at the database or server level. This impersonation depends on whether the module is a database-level module, such as a stored procedure or function, or a server-level module, such as a server-level trigger.

Thanks!

Post #630536

John Laskey

Posted Tuesday, January 06, 2009 8:03 AM

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I believe there is more than one correct answer to this question... I think this depend on your perception of Impersonation.

Post #630600

SanjayAttray

Posted Tuesday, January 06, 2009 8:29 AM

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I think answer should be option 1 and 3.

-- Impersonating allows a member of the sysadmin fixed server role or db_owner fixed database role to impersonate another user

http://blogs.msdn.com/sqlclr/archive/2006/06/16/635003.aspx

SQL DBA.

Post #630625

Steve Jones - SSC Editor

Posted Tuesday, January 06, 2009 8:34 AM

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I'll correct the answers to show both as correct.

As usual, I started with a topic in BOL, in this case impersonation, which didn't mention the EXECUTE AS clause. Though I should have checked that section to see if it applied as the same term.

Points will be awarded back.

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Post #630630

SQLBOT

Posted Tuesday, January 06, 2009 8:40 AM

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A SQL Server Central points Bailout!

Blink

What is this world coming to?

I'll confess that I'll be a benefactor to Steve's 700 billion point bailout package.
Looking forward to the forums stimulus package, too!

~BOT

Craig Outcalt

Tips for new DBAs: http://www.sqlservercentral.com/articles/Career/64632
My other articles: http://www.sqlservercentral.com/Authors/Articles/Craig_Outcalt/560258

Post #630640

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