I can not understand why and how to use the database?

Question

SQL

Friends, hello. I want to start studying the database and STUPIDLY I don’t understand how to use and why the DBMS and this sql. I read and looked a lot on the Internet, but I still don’t understand why and where do I need this select this join
I study django
why do I need sql if in django ORM
in video tutorials they just go to the terminal and write their selects
WHY ALL THIS ???
help, I beg you

Answer 1

If not why, don't use it, what's the problem?
PS then you will understand if you grow up.

Answer 2

The database stores structured (or not so) information. For example, the list of contacts in your phone is also a kind of database. The database is used for convenience. You can also store information in a plain text file. This will make it more difficult to work with. At the same time, the database is not only more convenient, but also faster.
Any selects, etc. commands are access to the database for certain information. You can do this in the terminal or using scripts (if you know how). There are quite a few GUI software where instead of writing a selector and other commands, you will click on the buttons "select", "range", etc.
To simplify, imagine any table in Excel, where everything is clearly structured and visually understandable. It also will be similarity of a DB. The same table can be stored in a text file, separating the data with commas or another character.
If you do not understand why all this is needed, then, as said above, you do not need it yet.