Cost of living in Bologna (Italy) is 22% cheaper than in Aalborg (Denmark)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 238 prices entered by 59 different people.
For example, to keep the same standard of living that would require kr23,000 in Aalborg you would need to make just about kr17,859 (€2,396) in Bologna.