Do you get squeamish about your data rubbing shoulders with other businesses’ data on the same hardware?
Although cross-traffic between separate companies’ data is virtually impossible, it can give the less technically-minded the frighteners about security. Plus, the chance of slowdowns due to multiple databases running simultaneously is a more substantial risk.
A private cloud database is when it’s still running in a remote datacentre, but it has its own dedicated server, which never changes. You usually have to pay more for this, but it means that you can specify the performance of your server(s) in advance, and you won’t have to share bandwidth or processing power. If you wanted to cause havoc at your company, you’d only have to flick one switch on 'your server', not all the switches in the datacentre (that’s a metaphor for illustrative purpose only!).
This is also available in the Xynomix Cloud.