Both errors are the result of the fact that, on Dreamhost, user cannot create databases except via the control panel. The user can, however, create tables within an existing database.
My suggestion to work around this problem is to create the (empty) database via the Dreamhost Control Panel (Goodies, MySQL, etc.), then modify your sql file to eliminate the "create database" step, leaving the statements necessary to add the table in the file.
Each of the messages you received are the result of trying to via create a new database (via PhpMyAdmin, etc.), which your user is not allowed to do.
If this information isn't sufficiently helpful to you, you might want to do a little research on the Dreamhost wiki for additional help and information about MySql of Dreamhost, then post again with a more specific question. Good Luck!