2021
YoshkarOla - DB 2021 of 12 parts
    https://www.youtube.com/playlist?list=PLAyGZSpiecFrZx_qX6em16P9lIuoaOG-Y
2014
Gurovits - DBs for School ru
    https://www.youtube.com/playlist?list=PLDrmKwRSNx7LI_umdfXOeOJWjoDn6qvgN
    https://intuit.ru/studies/courses/1011/309/info