There is a lot of ways to get your database schema, and depending on your setup they are more or less convenient.
From databases #
PostgreSQL #
Use pg_dump:
pg_dump --dbname=postgres://postgres:postgres@localhost:5432/my_db --table='public.*' --schema-only > my_db-$(date +%d-%m-%y).sql
MySQL #
Work In Progress 😅
MariaDB #
Work In Progress 😅
SQL Server #
Work In Progress 😅
Oracle #
Work In Progress 😅
From tools #
phpMyAdmin #
Work In Progress 😅
DataGrip #
Work In Progress 😅
DBeaver #
Work In Progress 😅
From frameworks #
Rails / Active Record #
Work In Progress 😅
Symfony / Doctrine #
Work In Progress 😅
Phoenix / Ecto #
Work In Progress 😅