I am creating a new client database in salesforce. I have created a custom object and started to create custom fields & relationships with the parameters our current MS Access DB already has (ie. Name, Phone, Addy). I am wondering how the behaviour of the import will act if I don't include certain fields into the new Client object. 

Does my new Client Object and corresponding custom fields need to match my current DB fields exactly or can I skip certain fields?

Also if I can do this, what happens to those fields imported into my Client Object but have no matching custom field?


Thanks