How to Change the Owner of Database in SQL SERVER

Check database owner by the below sql query:

select name, SUSER_SNAME(owner_sid) OWNER from sys.databases;

To change the owner of a database, the following either way should do the job.

  1. On SQL Server Management Studio -> Right Click on Database -> Properties-> Files ->click Owner..

2. Change owner of a database by sql.

ALTER AUTHORIZATION ON DATABASE::TESTDB TO "VIRTUALLAB\Administrator";

If you meet the following error messages.

Msg 15110, Level 16, State 1, Line 48
The proposed new database owner is already a user or aliased in the database.

Then drop the user first, and re-run the above one.

USE "TESTDADB";
GO
drop user "VIRTUALLAB\Administrator";

ALTER AUTHORIZATION ON DATABASE::TESTDB TO "VIRTUALLAB\Administrator";