Q:

Can the iPhone only use an SQLite database?

Can the iPhone use other databases besides SQLite, like MySQL?

A:

The iPhone can only use SQLite as a database, directly on the device. This means there is no MySQL server inside the iPhone. But you can, and are free to have (your own) MySQL Back-end server, to which iPhone applications connect to. But Apple doesn't provide the server, so you have to pay the maintenance costs

