如何为数据库名创建Sql同义词或“别名”?

I'm using ms sql 2008 and trying to create a database name that references another database. For example 'Dev', 'Test', 'Demo' would be database names that i could reference from my multiple config files, but each name would point to another database such as 'db20080101' or 'db20080114'. I'm using ms sql 2008 and trying to create a da