Cron Job -All or Nothing?

I am trying to set up a Cron Job. When I run it says that it is inserted. However when I enter my database nothing is in there.

Does each part column of a cron need to be correct for it all to work. For example if I have the code for column corrrect but one wrong will it now work at all?

However, when I manually enter information into the database I can echo it. But I cant Cron Job it in there.

what command are you trying to put into cron?