There are many short-term training courses, ranging from 1 week to several years.

Regular full-time undergraduate course lasts for 4 years, master's degree usually lasts for 3 years (you can graduate in the shortest 2.5 years), and doctor's degree usually lasts for 3 years (but some students never graduate in 5 or 6 years). I really don't know the length of master's degree and doctor's degree. It seems to be five years.