How do i make my DB tables relational?

Question

I'm creating an online forum for programmers as my final year project where a registered user can post either text, image or video, comment on other users post, like a post or dislike it etc. I don't really understand relational database. Any ideas on the tables to create and how to make them relational?
pls I need your comments.

Answer 1

Google SQL Joins for details.
Select Name,some,other from table1,table2 where table1.ID=table 2.ID;

Answer 2

Anytime bro.

Answer 3

ok thanks a lot. 👍