Which is the best website to learn database management system?

Answer 1

To learn the basics of SQL, you can use sqlzoo

Answer 2

tutorialspoint.com

Answer 3

First of all, which Relational (or NoSQL) Database Management System do you want to use?

Answer 4

yes it have theoretical RDBMS tutorial over their, wait I'll post exact link

Answer 5

https://www.tutorialspoint.com/sql/index.htm
this may helps​ you, don't forget to mark correct if it suits your need