The correct command to transfer ownership of a schema (or database, as they are interchangeable in this context) to another user is ALTER SCHEMA schema_name OWNER TO principal. This command alters the metadata associated with a schema by setting the owner to the specified principal. The username should be enclosed in back ticks. This method is preferred for auditing and metadata recording purposes. The correct answer is ALTER SCHEMA retail OWNER TO 'user@myteam.com'. For more information, refer to the ALTER SCHEMA documentation in Databricks SQL.