The CurrentWare Server is compatible with two types of databases – Firebird Server or SQL Server.
For setups with more than 300 users, we recommend using SQL Server. For smaller setups, use Firebird for simplicity.
The default database that comes with the CurrentWare setup is Firebird. When you go through the CurrentWare installation process it automatically sets up a Firebird server for you.
If you are looking to install and setup a SQL Server to use with your CurrentWare software, please see our informative guide here: SQL Express Setup with CurrentWare
If you start off with Firebird but want to scale up to a SQL database in the future, there is a database migration tool that helps you with that.