更改数据库Alter Database
ALTER [DATABASE|SCHEMA] db_name SET DBPROPERTIES (key=val, ...)
SET DBPROPERTIES
为数据库指定名为 key 的属性，并将该属性的值设置为 val。Specify a property named key for the database and establish the value for the property respectively as val. 如果 key 已存在，则 val 将覆盖旧值。If key already exists, the old value is overwritten with val.
分配所有者Assign owner
ALTER DATABASE db_name OWNER TO `user_name@user_domain.com`
为数据库分配所有者。Assign an owner to the database.