I have setup my first db migration using the built in migration tools of yii, and locally i can run
./yiic migrate
I can see it say "this migration needs to run" and press Y and it runs and works fine.
When i deploy my site, I can automatically run that command but not pass the Y
Is there a command or url i can hit to upgrade the db without logging in and pressing Y?
Yes, use the command: ./yiic migrate --interactive=0
and it will run without prompting you.
See http://www.yiiframework.com/doc/guide/1.1/en/database.migration#use-command-line-options for more details.