thank you for your info. It means that I should perform simple SQL insert statement? I came from HP Service Desk community and direct modification of DB layer was completely unsupported there. But it sounds quite easy. If it is supported way I will try it.
I am pretty sure you can do this. Though the usual practice is to use the interface tables for various types of data insertion into the core tables, but unfortunately, for roles, skills and some other end user data, there are no columns in the interface tables to import this data to. But since the skills tables is fairly easy with only relationship with the skill proficiency table this should be easy to do. I have seen people importing roles and skills into its tables directly. You can test run before importing all the skills, by importing a couple of skills and then testing it on front end by viewing it, associating with a user, etc. to make sure the data inserted into each column of the skills table is working fine.