What databases are hosted?

Question

Network administration

Tell me, please,
How is the database on the hosting arranged?
MySQL is written everywhere and that's it, i.e. do they not support others?
And if MySQL is written, does this mean that MySQLi, respectively?

Answer 1

Everyone there supports and if something is not there, they must install it or return the money.
And on a dedicated vps server, you can install anything you want.

Answer 2

db mysqli does not exist it's just one of the PHP interfaces for db mysql

Answer 3

MySQL (and MariaDB may actually be, despite what is written about MySQL)
PostgreSQL is available, but less frequently.
On the cloud - in general, dozens of DBMS for every taste.
In general - now VPS costs a penny.
You take VPS type hosting and install what you need BY YOURSELF.
MySQLi - obsolete. And this !!!! Not SUBD!!!