security does not allow to work on "Database Diagrams" in SS2005

I am trying to work on "Database Diagrams" in SQL Server 2005 and it complains that I should be the owner of the DB to work on the . I right clicked on the database and checked properties, and i do see that I am the owner, but when I go under Filegroups, and see who is the owner; it is blank, and if I try to add me there as the owner, it is not allowing me.

Any thoughts how to over come this security issue.

Thanks
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anushahannaAsked:
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kbacConnect With a Mentor Commented:
Try this:

EXEC sp_dbcmptlevel 'your database name here', '90';
go

ALTER AUTHORIZATION ON DATABASE::'your database name here' TO 'your valid login name here'
go
use ['your database name here']
go
EXECUTE AS USER = N'dbo' REVERT
go


Or, you can use Visual Studio, and use the data connections to register your db server, and open the db diagrams there. Just like your SQL server management tool, it will ask if you want the required objects to be created, accept this and then try creating db diagrams on the management tool.

And finally, you can still try to change the compatibility level to 80, try, then change it to 90 again and try if those don't work.
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Anthony PerkinsCommented:
Have you tried:
sp_changedbowner 'YourUserName'
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kbacCommented:
If the ownership adjustment as acperkins suggested does not work, check your compatibility level. Right click database--> properties--> options

If you have restored this database from a SQL server 2000 db, you'll need to change the compatibility level to 80 (Sql server 2000) for opening the diagrams.
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anushahannaAuthor Commented:
acperkins,
Thanks for the tip, but that did not help. I am the owner of the DB..... just not the files!
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dportasCommented:
There is no owner for files in SQL Server. Please tell us exactly what error message you are experiencing.
It has to be said that the ability to modify the database from a diagram in SQL Server is a truly terrible feature. Notoriously buggy and reportedly actually dangerous in some cases. I don't know why you want to do this but if you really feel you must then be careful about using it on any production system. I suggest you only do it against a database that doesn't matter - one on your local machine for example.
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anushahannaAuthor Commented:
dportas,
I am using the Diagrams in my desktop for some verifications-safe for data.

Here is the place to put the owner for Files (apart from the database). (see attached)
Owner-for-Files.bmp
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dportasCommented:
That's not the owner of the files. It's the owner of the database. SQL Server has no concept of a file owner.
What error message are you getting that makes you think you have a problem with files?
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anushahannaAuthor Commented:
kbac,
It is a SQL Server 2005 database, and the compatibility level is indeed at 90.
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anushahannaAuthor Commented:
dportas,
Please take a look at the message, when I try to access 'Database Diagrams'.
error-message.bmp
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dportasCommented:
My practice is to make SA the owner of every database. This has nothing to do with your individual user permissions and it doesn't expose any special security flaws, it's just that a valid owner must be specifed. I definitely wouldn't recommend using any Windows login as a database owner because if the user's account expires then SQL can't verify it and some things may break as a result.
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Anthony PerkinsCommented:
Most definitely.

anushahanna,
As I suggested earlier you have a problem with the Owner of the database you need to use sp_changedbowner to set it right.
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anushahannaAuthor Commented:
acperkins
I did run the command you recommended, but it did not help. It gave the  message "Command(s) completed successfully."; but not sure what exactly happened, as the error message or the feature of Database Diagram is still not available.

I still get the error message (See id 24871889). And that error message is point to the place in snapshot I posted in ID 24869330.

In this case, the database owner is one with full system admin previledges.

thanks
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anushahannaAuthor Commented:
kbac
When I tried the code, at the 'execute' line, it complains the following:

Could not obtain information about Windows NT group/user , error code 0x6e.
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anushahannaAuthor Commented:
never mind.. i had the wrong domain. Thanks kbac
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kbacCommented:
Oh did it solve it? Gratz.
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anushahannaAuthor Commented:
kbac, Yes, it did. thanks.
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