Selecting data from two different tables of the same database in PHP/ MYSQL

I have 2 different tables SECTION and SUBSECTION in a database QUIZ. The SECTION table has 2 columns section_id and section_title, whereas SUBSECTION table has 4 columns section_id, subsection_id(AI), subsection_title, subsection_detail. Now, what I want is that the section_title but the table that needs to be queried is the SUBSECTION table and with the help of the section_id from the SUBSECTION table we would have to fetch the section_title from the SECTION table.

I have tried some of the solutions given over here but I don't know why these aren't working for me. Any help here would be highly appreciated.