Install SQLite3 for the light use of the database.
“SQLite3” refers the version 3. “SQLite” calls the legacy version 2. Here we install only version 3.
# apt install sqlite3 libsqlite3-dev
No configuration required.
SQLite3 is a file-based database. Unlike large scale DBMS, full backup is just copying the file, delete database can be done by deleting the file.
libsqlite3-dev is not a must, but you'll need them when you work with Ruby on Rails.
Like MariaDB, PHP and Ruby need interfaces. Python3 has SQLite3 interface by default.
# apt install php-sqlite3 ruby-sqlite3