Database Management 

https://www.youtube.com/watch?v=vf5HAEQwD5g&list=PLKmL-qUJew0mPDlHMuuT06TuFfRF1WFBt

https://onlinecourses.swayam2.ac.in/nou22_lb20/preview#_=_

https://mrcet.com/downloads/digital_notes/ECE/III%20Year/DATABASE%20MANAGEMENT%20SYSTEMS.pdf

https://josephscollege.ac.in/lms/Uploads/pdf/material/DBMS_Material.pdf

https://sircrrengg.ac.in/images/CSEMATERIALS/R19_DBMS_MATERIAL.pdf

https://www.svecw.edu.in/Docs%5CITIIBTechIISemLecDBMS.pdf