At the first appearance, you will automatically win if the tenant does not show up. If the tenant does show up, he or she will probably ask for a trial. You will get a trial date on which you and your tenant will each argue your side. If the judge decides for the tenant, you may have to pay his or her legal fees. If the judge rules for you, you can get a court order to have the sheriff post 3-day notice on the tenant's door. This means that if the tenant does not move within 3 days, the sheriff will physically remove the tenant from your property. Remember that in Oregon (and in all states), it is illegal for a landlord to physically remove a tenant. A landlord must get a court order and a sheriff to remove a tenant from his or her property.
Remember that you can always seek the advice and counsel of an experienced Oregon evictions attorney if at any point the eviction process is becoming more than you have time to handle on your own.