As an international student, you must apply for a Danish residence permit prior to travelling to Denmark to be able to stay and study in Denmark, even if you are a European citizen. The residence permit will include work authorization. You must be enrolled in a study programme and participate in courses and exams during this period, otherwise, Aalborg University is obliged to inform the Danish Immigration service of your inactivity, resulting in an annulment of your permit.
We encourage you to check here, a Danish government website, to find out whether any certain requirements apply to applicants from your home country.
For more information regarding the Residence permit and the Civil Personal Registration number (CPR), which you will need at your arrival, visit here.