Why is the sqlite3 database table not opening?

Question

Flask

Good afternoon.
I have an initial web application, and I needed to create a database via SQLAlchemy + sqlite3
When the web application is launched, it does not give any errors, a file is created (mydatabase.db), there are a couple of columns in the class by type: email, password.
in the terminal I enter sqlite3 mydatabase.db
After I enter Select * from mydatabase.db;
and gives the following error: "Error: no such table: Users"
But if I open the database directly, then all the columns are there.
I tried to change both the name of the class and the name of the database, nothing helped.

Answer 1

You have created the Users class.
And now there are two ways. Hands to create the users table in sql that not to eat well.
Or run something like:
and then all tables will be created automatically.
https://habr.com/en/post/251415/

Answer 2

First, check which tables are in the database at all with the command
.tables