How To Replace Data From One Col With Another Col

There are 4 tables in a database. such as university, student, professor and worker. university table contains fields named- university_name, student_name, professor_name and worker_name. and student, professor and worker tables contain person_id and person_name.

Now, I want to replace the student_name, professor_name and worker_name data from university table with student table's person_id, professor table's person_id and worker table's person_id.