Can't Create Database Diagrams

In SQL 2008, I开发者_StackOverflows it a way to grant permission to developer for view and create database diagrams without giving them dbo permission?

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To take credentials to create db. Diagram, Try this query:

EXEC dbo.sp_changedbowner @loginame = N'sa', @map = false

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You need to change database owner to be able to create database diagrams.

To change the database owner:

ALTER AUTHORIZATION ON DATABASE::AshrafTestDB TO sa

Then refresh databases in object explorer in SSMS.

Now you should be able to add new diagrams.

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From Books Online:

To use Database Diagram Designer, it must first be set up by a member of the db_owner role to control access to diagrams.

And

any user with access to a database can create a diagram

In other words, a user with db_owner permissions must first enable diagrams in the database (to create the sysdiagrams table) and then anyone can create them. See Books Online for more information.

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I had permissions, yet i couldn't create diagram. After doing this, it worked

SELECT @@SERVERNAME; -- get your server name

ALTER AUTHORIZATION ON DATABASE::[*databasename*] TO [*servername*\Administrator];

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you can find a good description here: https://dba.stackexchange.com/questions/43946/permission-required-to-view-a-database-diagram

and here: https://www.mssqltips.com/sqlservertip/1816/getting-started-with-sql-server-database-diagrams/

These have helped me to solve my issue.