If you want to visit Denmark for a short period of time and you come from a country with a visa requirement, you must obtain a visa prior to entry. See a full list of such countries here:
If you come from a country with a visa requirement, you must meet some basic conditions to be granted a visa, see below.
You may be issued with a visa in connection with a business visit if there is an actual commercial relationship between your own company/organisation and the company/organisation in Denmark which you wish to visit.